Thunderbird portable on a portable hard drive has been working fine for 2 months. Now it will not start up.
New: Audacious (June 1, 2023), Platform 25.0 (Apr 07, 2023)
New Apr 14: macOS Portable Drive Support
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I have the same problem!
Friday I still used it - no problems.
Saturday morning suddenly everything (Emails, accounts, addresses) was gone and Thunderbird asked me "Do you want to make a new account?".
NO, I don't!! I simply want my emails back!!! :-((((