Thunderbird beta did not bring address book
My T-Bird address book did not carry over to the BETA version. I cannot find that file to import on my computer and cannot reboot the former T-bird version.
Opaite Mbohovái (1)
The beta is designed to coexist with the release version, so there is no need to replace the release. On the addressbook, look for a file whose name begins with 'abook' - you can import with TB, or copy into profile when TB is not running.