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Golden rule to follow when upgrading from an old version of TB i.e. 78.x.x to a new major one i.e. 91.x.x

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  • Last reply by scg

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For POP3 accounts This means that all emails are kept locally and not on server. All sent emails are kept on the server and copies can be found locally in Sent local folder. Calendar is kept locally Contacts are kept locally

Using import export tools ng (now supports only TB78.x.x.) export all emails in inbox folder as .eml in a folder you created on the disk. Using import export tools ng (now supports only TB78.x.x.) export all emails in sent folder as .eml in a folder you created on the disk. An alternative method is to select all messages in respective folder with Ctrl+A and save as.... Export your local contacts as vcard i.e. vcf format in a folder you created on the disk. Export your calendar in a folder you created on the disk.

Delete Thunderbird folder in Local and Roaming folders (i.e. profile folders). Uninstall TB 78.x.x. Install TB 91.x.x. Create a new profile Create your accounts Import contacts Import calendars Since import export tools ng does not support TB 91.x.x. till now, you can use the free application Mailstore https://www.mailstore.com/en/support/downloads-and-resources/#mailstore-spe. First archive the emails from the backed-up folders to the application (Archive email, choose EML and MSG files and then export them to Thunderbird (Export Email, Thunderbird as email client ) choosing your correct profile.

The new version of TB will work like a charm.

Instructions for IMAP accounts will follow......

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Lampros said

For POP3 accounts This means that all emails are kept locally and not on server. All sent emails are kept on the server and copies can be found locally in Sent local folder. Calendar is kept locally Contacts are kept locally Using import export tools ng (now supports only TB78.x.x.) export all emails in inbox folder as .eml in a folder you created on the disk. Using import export tools ng (now supports only TB78.x.x.) export all emails in sent folder as .eml in a folder you created on the disk. An alternative method is to select all messages in respective folder with Ctrl+A and save as.... Export your local contacts as vcard i.e. vcf format in a folder you created on the disk. Export your calendar in a folder you created on the disk. Delete Thunderbird folder in Local and Roaming folders (i.e. profile folders). Uninstall TB 78.x.x. Install TB 91.x.x. Create a new profile Create your accounts Import contacts Import calendars Since import export tools ng does not support TB 91.x.x. till now, you can use the free application Mailstore https://www.mailstore.com/en/support/downloads-and-resources/#mailstore-spe. First archive the emails from the backed-up folders to the application (Archive email, choose EML and MSG files and then export them to Thunderbird (Export Email, Thunderbird as email client ) choosing your correct profile. For IMAP accounts ( i.e. Google mail) This means that all emails (inbox and sent) are kept on on server. If calendar could be kept locally or on the server. Contacts logically are kept locally. Export your local contacts as vcard i.e. vcf format in a folder you created on the disk. Export your calendar in a folder you created on the disk (if kept locally), no need if you use provider's calendar. Delete Thunderbird folder in Local and Roaming folders (i.e. profile folders). Uninstall TB 78.x.x. Install TB 91.x.x. Create a new profile Create your accounts.Import calendars if kept locally or connect to it (if kept on the server) when account is created (TB 91 gives this possibility). Import contacts Install any add-on you need, The new version of TB will work like a charm.

Modified by Lampros

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The author of the add-on has been away for a while, but I guess he is back now. https://github.com/thundernest/import-export-tools-ng/issues/264

But that does not validate this process which is entirely unnecessary for the overwhelming vast majority of folks. In excess of 99% and probably closed to 99.99. We see a few folk with issues after every update. (68 was a killer) Usually caused by their anti virus or an addon. But each and every update is designed to update the profile.

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Matt, We are a group of 65 persons who faced many problems when upgraded to TB91 keeping the old profile of TB 78.x.x. We ended up to the procedure I described above and Now there is no problem. Hope our group to be helpful for many users.

Note. Our group uses TB since it's birth! We hope that one day all the functions of the most important addon import export tools will be implemented natively in TB.

Modified by Lampros

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Check this thread last post it's a fairly simple way to get your email working without going through the deleting, importing etc. https://support.mozilla.org/en-US/questions/1349416.

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