Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
This thread was archived. Please ask a new question if you need help.
Archived

Upgrading to 140.0.1 (esr) 64bits broke my profile

Thunderbird Profiles
hubchau replied
hubchau
hubchau

Hi,

Just upgraded to 140.0.1 and when I restarted Thunderbird it asked that I create a new profile, as if it was the first time I used it. I checked in %APPDATA%/Thunderbird/Profiles, I have 2 folders, one ends with .default (47 b), the other one, ends with .default-release (around 7Gb). I've tried messing a bit with the profiles.ini and the install.ini files but it didn't change anything appart from creating other 47b folders when restarting Thunderbird. So I'm back to the original files but I'm stuck. When I open the about:profiles page, the .default-release one does appear at the top and seems to be the default one, yet nothing shows up in the usual window.

What should I do?

Thanks a lot

Hi, Just upgraded to 140.0.1 and when I restarted Thunderbird it asked that I create a new profile, as if it was the first time I used it. I checked in %APPDATA%/Thunderbird/Profiles, I have 2 folders, one ends with .default (47 b), the other one, ends with .default-release (around 7Gb). I've tried messing a bit with the profiles.ini and the install.ini files but it didn't change anything appart from creating other 47b folders when restarting Thunderbird. So I'm back to the original files but I'm stuck. When I open the about:profiles page, the .default-release one does appear at the top and seems to be the default one, yet nothing shows up in the usual window. What should I do? Thanks a lot

All Replies (1)

hubchau
hubchau Question owner

Here’s what I tried after posting:

  • I fully closed Thunderbird and launched it via the Profile Manager using thunderbird.exe -p
  • I selected the existing profile default-release (which maps to the 7GB folder zfu3t99k.default-release) — but Thunderbird still starts fresh, as if the profile is empty.
  • I also created a new profile via the Profile Manager, manually pointing it to the zfu3t99k.default-release folder. Same result — Thunderbird starts blank, with no accounts or emails.
  • I tried editing profiles.ini to make sure it points only to zfu3t99k.default-release, marked it as Default, and removed any Locked=1 line — still no luck.

So it seems Thunderbird sees the profile folder, but won’t load or recognize the data in it.

Any advice would be greatly appreciated!

Modified by hubchau