On some Computer My Thunderbird Profile is Stil the same as from the first Version of Thunderbird from 2006. It carry a lot of strange Files and is way bigger in size then a new Profile.
Please develop a full migration of the Thunderbird Profil into a new Profile.
Beside my I'm also Family admin of several PC with Thunderbird. Most of their Profile has the same age like my profile. It would be nice If I could migrate these Profile as easy as possible. I do not wish to setup mail clients new and may forget settings or addons.
I suggest following behavior.