My Thunderbird restarts (crashes) repetitively, it is impossible to use it. It started when I tried to mark as read the last message of the inbox of the main account, as it crashed when just selecting that message, I tried other ways to have it marked as read, without success. The last thing I did was selecting all the messages in the inbox and marking all of them as read, and now, I do not get to solve the crash problem, even after marking all the messages as unread again. Thunderbird now enters but crashes in a few seconds, turning it impossible to use it. Does anyone know how to solve it? (It seems to be a little BUG in Thunderbird).