This morning I tried logging into my E-mail only to find my old Thunderbird version has been upgraded to 78.7. Usually I get a notification and the option to install, but this did not happen on this occasion. I checked the versions using 'sudo apt policy thunderbird' and get; Installed: 1:78.7.1+build1-0ubuntu0.18.04.1~mt1 Candidate: 1:78.8.0+build1-0ubuntu0.18.04.1~mt1 Version table: 1:78.8.0+build1-0ubuntu0.18.04.1~mt1 500 500 http://ppa.launchpad.net/mozillateam/ppa/ubuntu bionic/main amd64 Packages *** 1:78.7.1+build1-0ubuntu0.18.04.1~mt1 100 100 /var/lib/dpkg/status 1:68.10.0+build1-0ubuntu0.18.04.1 500 500 http://gb.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages 1:52.7.0+build1-0ubuntu1 500 500 http://gb.archive.ubuntu.com/ubuntu bionic/main amd64 Packages The new version did not carry over my old data and all I have is a blank install with no messages, contacts, calendar or anything else. I desperately need to get into my emails and calendar. Can anyone tell me how to do this, or how to revert back to my previous build without losing anything? This is a real annoyance and there was never any warning at all that my machine was being upgraded, otherwise I would have declined.