I just tried to check my email. Started Thunderbird and it wants me to set up email accounts. It is acting like it can't find any of my settings, old mail etc.
Looked under the profile folder and there is no file "profile.ini".
Also, there is no user or default user folder. just the profile folder,then extensions, mail and webmail folders underneath.
If I look under the profile/mail folder, it looks like all my stuff is still there, I just don't know how to get Thunderbird to start using it again.