So from the profile manager I made a working default copy. Then created a new profile, renamed and moved to the appropriate folder the profiles from my Windows PC. Ensured it worked


Perhaps this will help as well, how to start your profile manager without TB running
Copied from someplace..
Close the application completely and make sure that it is not running in the background. Assuming the program is installed in the "Applications" folder, launch Terminal ("Applications -> Utilities -> Terminal") and enter the command starting with / after the prompt in Terminal:
/Applications/Thunderbird.app/Contents/MacOS/thunderbird -profilemanager
Thanks again... for the forum, and those that help