Thunderbird absolutely refuse to remember my password. When i install Thunderbird 78.11.0 and start it the first prompt ask me for my password and then i check the box remember password and when i click OK i get a new prompt to enter my master password. I didn't set a master password. So i don't get my emails. I read that if you delete Key3.DB in the profile folder it will reset the remember password. The problem is that there is no Key3.DB file there. I can see only Key4.DB file . So what is the solution? Thanks for any help.