You could try un-install Thunderbird again and also the profile folder. Then re-install it which will create a new profile folder.
There maybe a corrupted file in there. Just one thought, if you are using XP can you do a restore?
Galaxy Note 8 vs iPhone X
Awful clip art from 1994 is being tweeted every hour by a bot
iPhone X vs Samsung Galaxy Note 8
Les meilleurs navigateurs internet 2017