If there are any remnants of your old profile, they would be in c:\users\<yourid>\appdata\roaming\thunderbird\profiles. There may be more than one folder in the profiles folder and any leftover messages would be in the Imapmail folder or the Mail folder.

It seems like all my local folders are there, but I can't access them. Every time I reinstall, it overwrites some old data.

I stored my data on d:/my documents/profiles. I found it, but can't import it. I just get the message "Import failed." Even though import fails, under "Local Folders", Thunderbird shows "Thunderbird Import" ,"imap.gmail.com", "imap.googlemail.com", "Local Folders", "mail.bezeq-1.net", "mail.bezeq-2.net", and finally "mail.bezeq.net". All folders under local folders are empty.

Please do a screenshot of the my documents\profiles folder, the profiles\Mail folder, the profiles\Mail\Local Folders folder, and the profiles\imapmail folder.

I tried uninstalling and reinstalling. This folder now has only 111 MB It seems like all the data disappears whenever I reinstall Thunderbird. All of my backups seem to be of this worthless file. I found another Profiles folder Under "/Users/night/Appdata/Thunderbird/" with 8 GB. It had 7 separate profiles within it. It seems each time I try reinstalling, it makes a new profile, or erase some data The last 6xk2buio.default.esr has 3.6 GB. My computer is crashing. Need to reboot

Each time Thunderbird starts, it tries to use the current default profile. If it finds any discrepancy, it creates a new profile. I suggest browsing the profiles with thunderbird not running to see what folders can be salvaged. IMAP data will auto repopulate, but any POP or local folders data will be inside the Mail or Mail\Local Folders folder. Message folders appear as two entities, such as inbox, inbox.msf. The msf files can be ignored as they are just indexes that will be auto rebuilt.

I found a backup profiles with some local folders preserved, I cannot import them into Thunderbird. I don't have a program to read them. What do I do?

- install the importexport addon if not already done - create a new local folder for each folder to recover - highlight a new folder, rightclick and select importexport option to import mbox - select one of the desired folders (but IGNORE the .msf entries) and import it - repeat for each desired folder.