Re-installing Thunderbird on Windows 11

If Windows was a fresh install, wiping and reloading, then all data on PC is lost. If you have a backup, we can assist in restoring it. If Thunderbird has not yet been reinstalled, you can verify absence of data with these steps: # enter %appdata% in search box on windows tool bar and press enter key # that should open FIle Explorer in the appdata\roaming folder # if there is a Thunderbird folder, let us know and we will assist, I doubt it is there if full Windows reinstall, but I show the option to check anyway. Tip: If the account was IMAP, you have lost nothing. Just reinstall thunderbird and set the account up again.