a., I took another look at the Thunderbird page and there is a way to see if you are using the profile that has been established. I also noted the loss of profile address happens occasionally. Interesting that kind of error. So I took a look at my files and saw that I could check for the profile address. To check Thunderbird profilefrom command line: cd .thunderbird/ ls -a . .. Crash Reports k33p8gn6.default profiles.ini cat profiles.ini [General] StartWithLastProfile=1 [Profile0] Name=default IsRelative=1 Path=k33p8gn6.default The tabbed over lines are the output. Note the Path should reference the same name as is listed in ./thunderbird/ directory. If this is correct you may have to do all the work of re-inputting your details, but your files as on the page Brian referenced. Good luck. Ted P