I made the grave mistake of upgrading Thunderbird to 78 without a backup
of ~/.thunderbird...
Platform is netbsd-9 (amd64) with pkgsrc X11. The machine completed a
pkg_rolling-replace today.
The newly installed mail/thunderbird converted my profile, but is unable
to render half of its UI - no mailboxes.
A newly built mail/thunderbird68 refuses to deal with the converted
profile, but does not respond to a click on "new profile".
Playing with 'thunderbird{,68} --ProfileManager' does not make a
difference.
In the end, I deleted thunderbird{,68}, and re-installed the old
thunderbird 68.10 from a binary package. Of course, I had to re-create
accounts, but, with this version, at least I could.
Do the updated Thunderbirds work for anybody?