Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

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

Restore an old profile

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by Matt

more options

My old computer crashed and I have a new one. I use Thunderbird for years so I have a lot of emails and address book in the old profile. I set up a new profile name and moved the contents of the old profile to the new folder. However if I try to change profile to read old emails I get a message about using different versions of Thunderbird...How do I get the old profile to run?...Can I transfer the old address books to the new profile? ... best regards, Peter

My old computer crashed and I have a new one. I use Thunderbird for years so I have a lot of emails and address book in the old profile. I set up a new profile name and moved the contents of the old profile to the new folder. However if I try to change profile to read old emails I get a message about using different versions of Thunderbird...How do I get the old profile to run?...Can I transfer the old address books to the new profile? ... best regards, Peter

All Replies (1)

more options

start Thunderbird with the appropriate command line to force the issue.

see https://thunderbirdtweaks.blogspot.com/2019/09/i-lost-my-profilemail-on-update-to.html in the profile per install part at the bottom of the post.