by SteveJohnson » Wed May 28, 2008 12:59 pm
If you are on Windows, your profile is located in C:\Documents and Settings\username\Application Data\Mozilla\ . Look for and rename the Thunderbird folder. Substitute your main drive letter for 'C' and your login name for 'username'.
Don't delete the Thunderbird folder - rename it, at least for now. It contains all your mail, archived and otherwise.