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How to Mark All Emails as Read in "Type App"

Downgrade Thunderbird profile from 78 to 68

Hullo guys, I'm a thunderbird fanatic and use it fifty-fifty at work managing x+ accounts. Up to Thunderbird 68, all was super fine:

The massive profile with 60+ folder was well organized with a scattering of incredible add-ons to: - color folders - customize color business relationship background - manage folder sorting The workflow was smooth and very productive: the folder colored to my like, the new email received were visible at a glance in the related folder by simply browsing and detecting the different emphasis in the binder name, so on.

I ever loved updates and kept the auto update on... until yesterday when my 68 has been migrated automatically to 78 !

No one of the necessary add-ons works anymore! No one of those fantastic the developer is anymore interested in upgrading them (changes are too frequent, and need to invest besides much time to upgrade them) The interface is to uniform, I cannot customize colors in the same efficient way.... If I want the aforementioned 60+ nested folder sorting, I need to rename all of them... When a folder receives a new email the accent color (sort of bold bluish) is nearly same as that of a binder with unread e-mail (bold black)... Oh my god, what a mess !

Since no add-ons are available to re adapt the profile like it was with Thunderbird 68, my simply option is to roll-dorsum to 68... and stay there until the necessary improver will become back to 78 (if any).

Exercise you know how I can convert dorsum my profile merely upgraded to 78 back to 68 ???

Please Please Please, assist me ! Pietro

Hi guys, I'yard a thunderbird fanatic and utilize it even at work managing 10+ accounts. Up to Thunderbird 68, all was super fine: The massive contour with 60+ folder was well organized with a handful of incredible add-ons to: - color folders - customize color account background - manage folder sorting The workflow was smooth and very productive: the folder colored to my like, the new email received were visible at a glance in the related folder by simply browsing and detecting the unlike accent in the binder name, and so on. I e'er loved updates and kept the machine update on... until yesterday when my 68 has been migrated automatically to 78 ! No one of the necessary add-ons works anymore! No i of those fantastic the developer is anymore interested in upgrading them (changes are also frequent, and need to invest too much time to upgrade them) The interface is to compatible, I cannot customize colors in the same efficient style.... If I want the same sixty+ nested folder sorting, I demand to rename all of them... When a folder receives a new e-mail the accent colour (sort of bold blue) is well-nigh aforementioned as that of a folder with unread email (bold blackness)... Oh my god, what a mess ! Since no add-ons are available to re suit the profile similar it was with Thunderbird 68, '''my only option is to roll-back to 68'''... and stay in that location until the necessary add-on will go dorsum to 78 (if any). Practice you know how I can catechumen back my contour just upgraded to 78 back to 68 ??? Delight Delight Please, assistance me ! Pietro

Chosen solution

Open your contour folder and encounter if you have a file named abook.mab.bak and another named history.mab.bak . Those are backups of your Personal and Nerveless addressbooks in the onetime .mab addressbook format (v78 does not apply the mab format, just v68 does. This is one of the major changes introduced in v78). To restore those backups, simply rename them to their original name, e.m abook.mab and history.mab and restart Thunderbird.

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All Replies (20)

You can run Thunderbird v68 with the --allow-downgrade commandline switch to downgrade your v78 contour for utilize with v68. See unable launch older version on profile

You tin run Thunderbird v68 with the --allow-downgrade commandline switch to downgrade your v78 profile for utilize with v68. See [[unable launch older version on profile]]

Thanks yous Stans,

it works perfectly apart from the fact that the Address Book is GONE !!

How can I recover it ?

Please assistance ! Pietro

Thank you you Stans, it works perfectly apart from the fact that the ADDRESS Book is GONE !! How can I recover it ? Delight help ! Pietro

Chosen Solution

Open up your profile folder and see if yous have a file named abook.mab.bak and some other named history.mab.bak . Those are backups of your Personal and Nerveless addressbooks in the former .mab addressbook format (v78 does not use the mab format, merely v68 does. This is one of the major changes introduced in v78). To restore those backups, simply rename them to their original name, e.m abook.mab and history.mab and restart Thunderbird.

Open up your profile folder and see if you have a file named '''''abook.mab.bak''''' and some other named '''''history.mab.bak'''''. Those are backups of your ''Personal'' and ''Nerveless ''addressbooks in the sometime .mab addressbook format (v78 does not use the mab format, simply v68 does. This is one of the major changes introduced in v78). To restore those backups, simply rename them to their original name, e.chiliad '''abook.mab''' and '''history.mab''' and restart Thunderbird.

I can't assist you because I have the same problem; I voluntarily upgraded last night. But more, Thunderbird 78 changed some mail server settings, correcting them didn't help, and it won't retrieve new e-postal service. I also trashed Thunderbird by but copying over 5.68 from another machine, and you know why that was a mistake. Come across my separate question here. I will try some of the suggestions in responses in a higher place and written report dorsum. UPDATE 9/17: information technology took a few hours to figure out what was going on, but I successfully downgraded to v.68 past first deleting the application, dock icon, and Thunderbird folder in user/library and then replacing them with a working v.68 from another machine (I had upgraded to v.78 on merely 1 of my 3 Macs, albeit the about important desktop). Glad to have a working version dorsum. Also, practice you run regular backups? (I should take idea that earlier). Y'all can certainly restore V.68 from a backup. It will be missing any changes since the last backup, only at least you'll have a good working version, and if y'all use IMAP, all the messages will be there. Also be sure to plow off automatic updates in Thunderbird!! Information technology is under Preferences/Advanced/Updates.

I can't aid yous because I accept the same problem; I voluntarily upgraded last night. But more than, Thunderbird 78 changed some mail service server settings, correcting them didn't help, and it won't call back new due east-mail service. I besides trashed Thunderbird by only copying over v.68 from some other machine, and you know why that was a error. Run across my separate question here. I will try some of the suggestions in responses above and study back. UPDATE nine/17: information technology took a few hours to figure out what was going on, but I successfully downgraded to v.68 by first deleting the application, dock icon, and Thunderbird folder in user/library and and then replacing them with a working 5.68 from another machine (I had upgraded to v.78 on just ane of my iii Macs, albeit the most important desktop). Glad to take a working version back. As well, do you run regular backups? (I should accept thought that earlier). You lot can certainly restore Five.68 from a backup. Information technology volition be missing any changes since the last backup, but at least you'll have a proficient working version, and if you use IMAP, all the letters volition be there. Also be sure to turn off automatic updates in Thunderbird!! It is under Preferences/Advanced/Updates.

Modified by Eric Godfrey

This so-called upgrade should have come with a alarm label. Forced agenda and we're disbling your post archiving tools because we know you;d rather annal one message at a time. And if you don't similar it, await for an up yours response in a support forum.

This so-called upgrade should take come with a warning label. Forced calendar and nosotros're disbling your mail archiving tools because nosotros know you;d rather archive 1 message at a time. And if yous don't like it, await for an upwardly yours response in a support forum.

patrick66 said

disbling your mail service archiving tools because we know yous;d rather annal one message at a time.

Y'all don't need whatever additional tool to save more than 1 message. You tin just select ALL the messages you lot want to save and use the Save As > File option bachelor in the menu or just press the Ctrl+South keyboard shortcut . You can save the selected messages in html, eml or text format.

''<p>patrick66 [[#answer-1350731|said]]</p>'' <blockquote>disbling your mail service archiving tools considering we know y'all;d rather archive one message at a fourth dimension. </blockquote> You don't need any additional tool to salvage more than one message. Y'all tin simply select ALL the letters you want to save and use the Relieve As > File choice available in the menu or simply press the Ctrl+S keyboard shortcut . You tin can save the selected messages in html, eml or text format.

patrick66 said

This so-chosen upgrade should accept come with a warning label. Forced calendar and we're disbling your mail archiving tools because nosotros know you;d rather archive one message at a time. And if you don't like information technology, wait for an upward yours response in a support forum.

100% agree. No upgrade should break existing functionality without a alarm. (Even from add-ons; add-ons are an intrinsic role of the Thunderbird ethos!) And no upgrade that might break functionality should make it so difficult to revert!

''<p>patrick66 [[#respond-1350731|said]]</p>'' <blockquote>This so-called upgrade should have come with a warning label. Forced agenda and nosotros're disbling your post archiving tools because nosotros know you lot;d rather annal i message at a time. And if you don't similar it, expect for an upward yours response in a back up forum. </blockquote> 100% hold. No upgrade should break existing functionality without a warning. (Even from add-ons; add-ons are an intrinsic office of the Thunderbird ethos!) And no upgrade that might break functionality should get in so hard to revert!

Stans said

Open up your profile folder and see if you have a file named abook.mab.bak and another named history.mab.bak . Those are backups of your Personal and Collected addressbooks in the old .mab addressbook format (v78 does not apply the mab format, only v68 does. This is i of the major changes introduced in v78). To restore those backups, simply rename them to their original proper name, e.one thousand abook.mab and history.mab and restart Thunderbird.

And what should I make of the fact that just half of my abook.mab files had .bak added. The others remained equally abook.mab. Was this a failure of the "upgrade" conversion process?

''<p>Stans [[#respond-1350107|said]]</p>'' <blockquote>Open your profile folder and see if you take a file named '''''abook.mab.bak''''' and some other named '''''history.mab.bak'''''. Those are backups of your ''Personal'' and ''Nerveless ''addressbooks in the old .mab addressbook format (v78 does not apply the mab format, but v68 does. This is ane of the major changes introduced in v78). To restore those backups, but rename them to their original proper noun, e.one thousand '''abook.mab''' and '''history.mab''' and restart Thunderbird. </blockquote> And what should I brand of the fact that only half of my abook.mab files had .bak added. The others remained as abook.mab. Was this a failure of the "upgrade" conversion process?

James6M said

what should I brand of the fact that just half of my abook.mab files had .bak added. The others remained every bit abook.mab. Was this a failure of the "upgrade" conversion process?

If the file name has .bak so it was converted and you lot should see the accost book listed in the version 78 interface.

If it doesn't have .bak in the filename and then information technology wasn't converted, and we would be interested in knowing the file name and then that the upshot can exist resolved. Delight send me a private message with the details.

''<p>James6M [[#respond-1351023|said]]</p>'' <blockquote>'' what should I make of the fact that merely half of my abook.mab files had .bak added. The others remained every bit abook.mab. Was this a failure of the "upgrade" conversion process? </blockquote> If the file proper noun has .bak then information technology was converted and you should see the address book listed in the version 78 interface. If it doesn't accept .bak in the filename then it wasn't converted, and nosotros would be interested in knowing the file name and then that the issue can be resolved. ''' Please transport me a individual bulletin with the details.'''

Modified by Wayne Mery

James6M said

Stans said

And what should I brand of the fact that only half of my abook.mab files had .bak added. The others remained as abook.mab. Was this a failure of the "upgrade" conversion process?

I don't know. I only had i abook.mab file in my profile and a single abook.mab.bak after upgrade. It'due south not surprising, though, that your case is not the same as mine or the OP'south, because we definitely have different setups and anything, internal or external, could have caused this. For example, I take explicitly configured my antivirus to exclude Tbird's profile binder from its real-time protection and scanning and then that is doesn't intefere with Tbird's file operations during its normal functioning. Is that the example for yous besides? Anyway, if you need further help and the solution offered here is not working for you, then starting time a thread of your own and yous will be assisted. Hijacking someone else'due south thread is just not ideal. I tend to unfollow solved threads, so your post in a thread you have hijacked could go unnoticed because I apparently won't become a notification for your post.

''<p>James6M [[#reply-1351023|said]]</p>'' <blockquote>''<p>Stans [[#answer-1350107|said]]</p>'' And what should I make of the fact that only half of my abook.mab files had .bak added. The others remained equally abook.mab. Was this a failure of the "upgrade" conversion process? </blockquote> I don't know. I but had i abook.mab file in my contour and a single abook.mab.bak after upgrade. It's not surprising, though, that your instance is not the aforementioned equally mine or the OP'due south, because nosotros definitely have unlike setups and annihilation, internal or external, could have caused this. For example, I have explicitly configured my antivirus to exclude Tbird'south profile folder from its real-fourth dimension protection and scanning so that is doesn't intefere with Tbird's file operations during its normal functioning. Is that the example for yous equally well? Anyhow, if you lot need further assist and the solution offered hither is non working for you, then showtime a thread of your own and you lot will be assisted. Hijacking someone else's thread is but not ideal. I tend to unfollow solved threads, so your mail in a thread you have hijacked could become unnoticed because I obviously won't go a notification for your mail service.

At least Thunderboird is so flexible an modular that you can do practically everything. This is what I did: - disinstalled the 78 - reinstalled the 68 - downgraded with the "-allow -downgrade" keys - removed all the newly created and empty ".mab" (I guess when running the 68 with the contour non yet downgraded) - renamed all the ".mab.bak" to ".mab" and the old 68 is now dorsum.

Just a trick: Be careful that if y'all leave the quondam contour with the "autoupdate" characteristic "on", every bit presently as you lot open the 68 you have the 78 autodownloaded that will be installed automatically the next time y'all open up Thunderbird: to interrupt this vicious circle, jump in the installation binder (C:\Programme Files\Mozilla Thunderbird) and delete the folder named "updated" tha you will find in that location and that contains the 78 just downloaded... ...and don't forget to remove the autoupdate option!

Pietro

At least Thunderboird is so flexible an modular that you can do practically everything. This is what I did: - disinstalled the 78 - reinstalled the 68 - downgraded with the "-allow -downgrade" keys - removed all the newly created and empty ".mab" (I guess when running the 68 with the profile non yet downgraded) - renamed all the ".mab.bak" to ".mab" and the old 68 is now back. But a trick: Be careful that if you leave the onetime profile with the "autoupdate" feature "on", as presently as yous open the 68 y'all take the 78 autodownloaded that will exist installed automatically the adjacent time yous open Thunderbird: to interrupt this vicious circle, leap in the installation folder (C:\Plan Files\Mozilla Thunderbird) and delete the binder named "updated" tha y'all volition notice there and that contains the 78 merely downloaded... ...and don't forget to remove the autoupdate option! Pietro

So, I:

  • Turned off automated updates in 78
  • uninstalled 78
  • reinstalled 68
  • ran thunderbird.exe -P --permit-downgrade
  • removed existing .mab files
  • renamed all .mab.bak files to .mab

and now when I try to run thunderbird I go the "You have launched an older version of Thunderbird" and it won't let me keep without creating a new profile. I don't desire to create a new profile. What did I do wrong? EDIT: I forgot to mention -- I am running Windows 10 professional

So, I: * Turned off automated updates in 78 * uninstalled 78 * reinstalled 68 * ran thunderbird.exe -P --allow-downgrade * removed existing .mab files * renamed all .mab.bak files to .mab and now when I try to run thunderbird I get the "You lot have launched an older version of Thunderbird" and information technology won't let me go on without creating a new profile. I don't want to create a new contour. What did I do wrong? EDIT: I forgot to mention -- I am running Windows 10 professional

Modified by lnoland

The control is thunderbird.exe --allow-downgrade You take higher up a "-P" more...

The control is thunderbird.exe --permit-downgrade You have higher up a "-P" more...

Thanks for your respond. I tried it with thunderbird.exe --allow-downgrade and still got the "You take launched an older version of Thunderbird bulletin." Whatever other ideas?

Cheers once again.

Cheers for your reply. I tried it with thunderbird.exe --allow-downgrade and all the same got the "Y'all have launched an older version of Thunderbird message." Any other ideas? Thanks again.

Wayne Mery said

If it doesn't have .bak in the filename and so it wasn't converted, and nosotros would be interested in knowing the file name and so that the issue can be resolved.

I had accost book files abook.mab and abook-ane.mab through abook-13.mab, excluding the numbers 2 and ten. All were active, that is, I could browse them under version 68. Roughly half of them had .bak added after the upgrade. I didn't notice any design. Unfortunately, I started my downgrade before I looked in the version 78 address book, so I can neither confirm which appeared in that location, nor which did/didn't have .bak added in the process. All the same, at that place were .sqlite files created for all of them.

In case it is significant, afterward following the process described by others above, just the abook.mab address book appears in my version 68 Address Book interface. All the others, the files are in the profile, simply they are not picked up by the application. In that location must be some file which indicates which MAB files to expect for? The upgrade+downgrade process seems to accept broken that link.

''<p>Wayne Mery [[#reply-1351024|said]]</p>'' <blockquote> If it doesn't accept .bak in the filename then information technology wasn't converted, and we would be interested in knowing the file name then that the result can exist resolved. </blockquote> I had address book files abook.mab and abook-i.mab through abook-13.mab, excluding the numbers 2 and 10. All were agile, that is, I could browse them under version 68. Roughly half of them had .bak added later the upgrade. I didn't notice any design. Unfortunately, I started my downgrade before I looked in the version 78 address book, and then I can neither confirm which appeared there, nor which did/didn't have .bak added in the process. Still, there were .sqlite files created for all of them. In example it is significant, later on post-obit the process described by others above, only the abook.mab address book appears in my version 68 Address Book interface. All the others, the files are in the profile, but they are not picked up by the application. There must be some file which indicates which MAB files to expect for? The upgrade+downgrade procedure seems to accept broken that link.

Modified by James6M

Further info for anyone who finds this thread and who uses more the single default address book: The update process besides changes the prefs.js file to point to the (newly created) .sqlite address book files. This must be reversed.

And then, remove the ".bak" from the backed up accost book files (if it was added, which I've previously noted was spotty in my feel). The matching .sqlite files may be removed equally well, as version 68 will non use them. And then, it is as well necessary to edit the prefs.js file to restore the connectedness to those restored files. Expect for lines of the form user_pref("ldap_2.servers.XXXXXXX.filename", "XXXXX.sqlite"); in which you change the "sqlite" to "mab", and also associated lines of the grade user_pref("ldap_2.servers.XXXXXXX.dirType", 101); in which you change the 101 to ii. (I have no deep knowledge of what 101 or 2 hateful. I was only restoring what I had in backed upwards files, and this seems to work.)

This appears to be needed only for accost books that you created. The default abook.mab must be hard-wired (I am guessing), so that a downgrade to version 68 automatically reverts to that file.

Further info for anyone who finds this thread and who uses more the single default accost book: The update process as well changes the prefs.js file to indicate to the (newly created) .sqlite accost book files. This must be reversed. So, remove the ".bak" from the backed up address volume files (if information technology was added, which I've previously noted was spotty in my experience). The matching .sqlite files may exist removed too, every bit version 68 will not use them. So, it is too necessary to edit the prefs.js file to restore the connection to those restored files. Expect for lines of the form user_pref("ldap_2.servers.XXXXXXX.filename", "XXXXX.sqlite"); in which you change the "sqlite" to "mab", and also associated lines of the form user_pref("ldap_2.servers.XXXXXXX.dirType", 101); in which you change the 101 to 2. (I take no deep knowledge of what 101 or 2 hateful. I was just restoring what I had in backed up files, and this seems to work.) This appears to be needed only for address books that you created. The default abook.mab must exist hard-wired (I am guessing), and so that a downgrade to version 68 automatically reverts to that file.

lnoland said

Give thanks you for your reply. I tried it with thunderbird.exe --allow-downgrade and still got the "You have launched an older version of Thunderbird bulletin." Whatever other ideas?

The -p switch launches the contour manager while the --allow-downgrade switch turns off the downgrade protection feature that is responsible for the "You take launched an older version of Thunderbird" prompt. The -p switch is optional if you simply have i profile, in which instance y'all won't need to use the profile manager. Re-create and paste the command line as follows:

thunderbird.exe --permit-downgrade                  

''<p>lnoland [[#answer-1351321|said]]</p>'' <blockquote>Give thanks y'all for your reply. I tried information technology with thunderbird.exe --allow-downgrade and however got the "Yous have launched an older version of Thunderbird message." Whatsoever other ideas? </blockquote> The -p switch launches the profile manager while the --allow-downgrade switch turns off the downgrade protection feature that is responsible for the "You take launched an older version of Thunderbird" prompt. The -p switch is optional if you just have one profile, in which example you lot won't demand to use the profile director. Copy and paste the control line as follows: thunderbird.exe --allow-downgrade

Stans said

lnoland said

Thank you for your respond. I tried it with thunderbird.exe --permit-downgrade and still got the "You lot have launched an older version of Thunderbird message." Whatever other ideas?

The -p switch launches the profile manager while the --permit-downgrade switch turns off the downgrade protection feature that is responsible for the "You accept launched an older version of Thunderbird" prompt. The -p switch is optional if you lot merely accept one profile, in which case y'all won't need to use the profile manager. Copy and paste the control line every bit follows:

thunderbird.exe --permit-downgrade                    

Thank you. I found my problem -- I was attempting to include the switch using Windows 10's search box thinking that it would include it when it launched the command (information technology included the full text in the search response so I thought that'southward what it would submit -- not true). And then, I opened a control window, moved to the Thunderbird folder and ran the command with switch there and that worked -- or at least information technology got me to the next pace.

''<p>Stans [[#answer-1351384|said]]</p>'' <blockquote>''<p>lnoland [[#respond-1351321|said]]</p>'' <blockquote>Thank you for your reply. I tried it with thunderbird.exe --allow-downgrade and even so got the "You have launched an older version of Thunderbird message." Any other ideas? </blockquote> The -p switch launches the contour director while the --allow-downgrade switch turns off the downgrade protection feature that is responsible for the "You have launched an older version of Thunderbird" prompt. The -p switch is optional if you lot simply take i profile, in which case you won't need to use the profile manager. Copy and paste the command line as follows: thunderbird.exe --allow-downgrade </blockquote> Thank you. I found my problem -- I was attempting to include the switch using Windows 10's search box thinking that it would include information technology when it launched the command (information technology included the full text in the search response then I thought that's what it would submit -- not true). And so, I opened a control window, moved to the Thunderbird folder and ran the control with switch there and that worked -- or at least it got me to the side by side step.

James6M said

Further info for anyone who finds this thread and who uses more than the single default address book: The update process also changes the prefs.js file to betoken to the (newly created) .sqlite accost book files. This must be reversed. . . .

Cheers and so much for this information -- I have a number of address books and panicked when they were missing. I was a fleck nervous nigh editing the prefs.js file just I made a fill-in first.

Later on making these changes, I still wasn't done. I accept a lot of filters defined and many of them are based on whether the sender is in a certain address book or they copy the sender into a certain accost book (I think those filters relied on the extension FiltaQuilla). Apparently when I opened Thunderbird without those accost books bachelor information technology reset all the filters to point to an address volume which was available which messed upward everything. I had to go through all my filters to detect the ones affected and put them dorsum (I hope) the way they were.

At any charge per unit, I recollect I'thousand upwards and running over again. Thank you, anybody, for your aid. And that automatic update setting is staying off.

''<p>James6M [[#reply-1351383|said]]</p>'' <blockquote>Further info for anyone who finds this thread and who uses more than the single default address book: The update process also changes the prefs.js file to point to the (newly created) .sqlite address book files. This must be reversed. . . . </blockquote> Cheers so much for this information -- I have a number of accost books and panicked when they were missing. I was a flake nervous about editing the prefs.js file but I made a backup first. After making these changes, I nevertheless wasn't done. I take a lot of filters defined and many of them are based on whether the sender is in a certain address book or they copy the sender into a sure address book (I think those filters relied on the extension FiltaQuilla). Apparently when I opened Thunderbird without those address books available information technology reset all the filters to indicate to an address book which was available which messed up everything. I had to go through all my filters to find the ones affected and put them back (I promise) the style they were. At any rate, I call up I'm up and running again. Thank you, anybody, for your aid. And that automatic update setting is staying off.

And for macOS users, to downgrade from Thunderbird=TB v78 into v68:

(1) move the TB v78 "/Applications/Thunderbird.app" into your "Desktop" (aka: "~/Desktop" or "$Habitation/Desktop") folder, (2) become the TB v68.12.0 macOS DMG installer-app from TB site : https://ftp.mozilla.org/pub/thunderbird/releases/68.12.0/mac/ (or get final v68),

(make sure to use secure/HTTPS based connection to download installer (DMG) file, Or obtain the hash/checksum code (of installer/DMG file) over secure/HTTPS based connection, & download (DMG, etc) file over any type of connectedness, & then calculate hash/checksum code of that installer/DMG file, & compare that code with the hash/checlsum code that is shown on source+secure Mozilla website.
If you have Mozilla's packet signing GPG/OpenPGP key in your system keyring , and so also go the *.sig file (over secure/HTTPS conection) that is for the last TB v68 DMG file, & use GPG command in Final to verify the downloaded DMG file's integrity, before installing.)

(3) then open up (or double-click on) the DMG file, (4) copy the "Thunderbird.app"(TB.app), & place/paste that within/into "/Applications" folder, (five) then open up "Concluding" from Utility, & run such command:"/Applications/Thunderbird.app/Contents/MacOS/thunderbird-bin" --permit-downgrade ... to downgrade your TB v78 profile, to use with the TB v68.

(5b) if you lot had multiple "profiles" in the TB, and then you lot accept to add together the option "-P" in front end of the "--permit-downgrade" selection, to 1st select (and downgrade) your default contour, and so run command again with "-P" and select other/next profile (to downgrade other profiles).

(6) bank check your contacts, etc in your TB's Address Book : goto TB main-menu > "Window" > "Accost Book" ( or press  + + B  (Shift+Command+B) buttons ). if you or macOS user have bug with Accost-Volume then see user:Stans solution posted above. EDIT: i'thou including it in below:

Stans said: Open your contour binder and meet if you have a file named abook.mab.bak and another named history.mab.bak . Those are backups of your Personal and Collected addressbooks in the quondam .mab addressbook format (v78 does not use the mab format, but v68 does. This is one of the major changes introduced in v78). To restore those backups, simply rename them to their original name, e.g abook.mab and history.mab and restart Thunderbird.
• If you had multiple "Profiles", and so you lot may see number after "abook" like these: "abook1.mab.bak" , "abook2.mab.bak", etc.
• Contour folder in macOS is hither: ~/Library/Thunderbird/Profiles/xxxxxxxx.default/

   If we expand the "~" (Domicile directory) then it is:/Macintosh Hard disk drive/Users/<username>/Library/Thunderbird/Profiles/xxxxxxxx.default/

more info: https://support.mozilla.org/en-The states/kb/profiles-where-thunderbird-stores-user-data

(7) again brand sure to gear up Machine-Update option in TB, to Off/disabled, by selecting this option: "Bank check for update, simply let me choose whether to install them". To select the above option goto TB "Preferences" ( its inside TB principal-menu > "Thunderbird" option (for TB in macOS, etc) . In left-side column/pane select "Advanced" > and so select "Update" tab in right-side > then under "Allow Thunderbird to" department, you will see/observe "Check for update, but allow me cull whether to install them" option.

Advanced step: Goto TB chief-menu > click on Tools -> Options, to enter the Options window, -> and then click on "Advanced" & select the "General" tab, -> Click on "Config Editor" button & it may again show "This might void you lot warranty !" . But click on "I'll be conscientious I promise!" to goto configuration editing mode : in "Filter" field, type app.update.enabled , it should be set to fake ( if yous've followed above step & selected the "Bank check for update, but let me choose whether to install them" option) , but if its showing "true" then double-click on the line to alter & prepare information technology to "false".

Credit/Reference : i limited THANKS to user:Stans for get-go+initially posting very helping info.

And for '''macOS''' users, to '''downgrade''' from Thunderbird='''TB''' v78 into v68<b>:</b> (<b>1</b>) motion the TB v78 "'''/Applications/Thunderbird&#46;app'''" into your "'''Desktop'''" (aka: "'''~/Desktop'''" or "'''$Dwelling/Desktop'''") folder, (<b>2</b>) get the TB v68.12.0 macOS '''DMG''' installer-app from TB site : https://ftp.mozilla.org/pub/thunderbird/releases/68.12.0/mac/ (or become last v68), <table width="100%" style="padding:0px;margin:0px;border-collapse:collapse;edge:0px;"><tr><td>&#160;&#160;</td><td><b>(</b>brand sure to use secure/HTTPS based connection to download installer (DMG) file, Or obtain the hash/checksum code (of installer/DMG file) over secure/HTTPS based connection, & download (DMG, etc) file over whatever blazon of connection, & then calculate hash/checksum lawmaking of that installer/DMG file, & compare that code with the hash/checlsum code that is shown on source+secure Mozilla website.<br /> If you have Mozilla's package signing GPG/OpenPGP key in your system keyring , and so as well get the <code><b>*.sig</b></code> file (over secure/HTTPS conection) that is for the last TB v68 DMG file, & utilise GPG control in Terminal to verify the downloaded DMG file'due south integrity, before installing.<b>)</b></td></tr></tabular array> (<b>3</b>) so open (or double-click on) the DMG file, (<b>4</b>) copy the "'''Thunderbird&#46;app'''"(TB.app), & identify/paste that within/into "'''/Applications'''" binder, (<b>5</b>) and then open up "'''Concluding'''" from Utility, & run such command: &#160;&#160;&#160;<b>"/Applications/Thunderbird.app/Contents/MacOS/thunderbird-bin" --allow-downgrade</b> ... to downgrade your TB v78 profile, to apply with the TB v68. <table width="100%" style="padding:0px;margin:0px;edge-collapse:collapse;border:0px;"><tr><td>&#160;&#160;</td><td>(<b>5b</b>) if you had multiple "profiles" in the TB, then y'all accept to add the option "-P" in front of the "--allow-downgrade" pick, to 1st select (and downgrade) your default profile, then run command again with "-P" and select other/next profile (to downgrade other profiles).</td></tr></table> (<b>6</b>) check your contacts, etc in your TB'due south '''Address Book''' : goto TB main-carte > "Window" > "Address Book" ( or press <b>⇧</b>&#8239;+&#8239;<b>⌘</b>&#8239;+&#8239;B&#160; (Shift+Command+B) buttons ). if you or macOS user have issues with Accost-Book so run into user:<b>Stans</b> solution posted higher up. EDIT: i'm including it in below: <table width="100%" mode="padding:0px;margin:0px;edge-plummet:collapse;border:0px;display:inline-cake;"><tr><td>&#160;&#160;</td><td><blockquote manner="display:inline-cake;">Stans [[#reply-1350107|said]]<b>:</b> Open your profile folder and see if you lot take a file named '''''abook.mab.bak''''' and another named '''''history.mab.bak'''''. Those are backups of your ''Personal'' and ''Collected ''addressbooks in the erstwhile .mab addressbook format (v78 does non employ the mab format, but v68 does. This is 1 of the major changes introduced in v78). To restore those backups, simply rename them to their original proper noun, east.1000 '''abook.mab''' and '''history.mab''' and restart Thunderbird.</blockquote></td></tr><tr><td>&#160;&#160;</td><td>&bull; If you had multiple "Profiles", then yous may run across number later "abook" like these<b>:</b> "abook1.mab.bak" , "abook2.mab.bak", etc.</td></tr><tr><td>&#160;&#160;</td><td>&balderdash; Profile folder in macOS is here<b>:</b> '''~/Library/Thunderbird/Profiles/xxxxxxxx.default/''' &#160;&#160;&#160;If we expand the "~" (Habitation directory) then information technology is: &#160;&#160;&#160;'''/Macintosh Hard disk/Users/<username>/Library/Thunderbird/Profiles/xxxxxxxx.default/''' &#160;&#160;&#160;more info: https://support.mozilla.org/en-The states/kb/profiles-where-thunderbird-stores-user-data </td></tr></table> (<b>seven</b>) over again brand sure to set up Auto-Update option in TB, to Off/disabled, by selecting this option<b>:</b> &#160;&#160;"<b>Bank check for update, just permit me choose whether to install them</b>". To select the above pick goto TB "'''Preferences'''" ( its inside TB master-menu > "Thunderbird" pick (for TB in macOS, etc) . In left-side cavalcade/pane select "'''Advanced'''" > and then select "'''Update'''" tab in right-side > then under "'''Let Thunderbird to'''" department, yous will see/notice "<b>Check for update, but allow me choose whether to install them</b>" option. <table width="100%" style="padding:0px;margin:0px;border-collapse:collapse;border:0px;display:inline-block;"><tr><td>&#160;&#160;</td><td>Advanced step<b>:</b> Goto TB main-menu > click on Tools -> Options, to enter the Options window, -> and so click on "Avant-garde" & select the "General" tab, -> Click on "Config Editor" button & it may again evidence "This might void you warranty !" . Just click on "I'll be conscientious I promise!" to goto configuration editing mode <b>:</b> in "Filter" field, blazon '''app.update.enabled''' , it should be prepare to '''false''' ( if you lot've followed above pace & selected the "Check for update, just let me choose whether to install them" option) , but if its showing "'''true'''" then double-click on the line to change & prepare it to "'''simulated'''".</td></tr></table> <img src="https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2020-09-25-00-19-40-47be37.png" /> Credit/Reference : i express THANKS to user:<b>Stans</b> for first+initially posting very helping info.

Modified past atErik

garnergint1999.blogspot.com

Source: https://support.mozilla.org/en-US/questions/1304550

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