I use Thunderbird as my email program on desktop. It was receiving and sending messages from both my Gmail and Yahoo email accounts, and I had set up local folders on the Yahoo account. I used the program earlier and then closed it. When I opened it again a few minutes later it opened to a Home screen that asked me to set up my account. What happened to the account(s) I was using? I looked at similar occurrences on the forum, but these seemed to deal with folders disappearing, not whole accounts. I had lots of historical emails stored by the program that I don't want to lose. I noticed under the C:....Users/{my name}/appdata/roaming/Thunderbird/profiles that there was a new profile established today, which I copied to another folder and then deleted from the location. After that, Thunderbird wouldn't open at all, saying that my profile could not be located. I tried copying the deleted profile back into the location, but that didn't seem to work (one pane shows it is there, but another doesn't), so I guess my "tinkering" has messed things up even further. Any help would be appreciated.