Re: thunderbird issues
Well how did you back it up? Did you just take your profile folder and move it or what? This would be better asked by the people who created thunderbird. Not many users here us it. We either use Incredimail, outlook or something like that. Very few Thunderbird users here.
Have you tried to export them from Windows mail? Or tried to import from Windows mail to thunderbird?
I do not accept support questions via EMail, PM, IM or my G+ page!
Phone: LG Optimus G Pro
Running: Stock JB from LG with Nova Launcher