https://wiki.mozilla.org/Thunderbird:Testing:Memory_Usage_Problems has an ordered list of things for you to try.

Thanks Wayne. I'll give this a try.

P

DoctorP how did it go?

Hello Wayne:

Thanks for your suggestion but I wasn't able to try them. Thunderbird was completely locked up. I tried starting in safe mode, starting in offline mode but it remained completely unresponsive. I used the command line thunderbird -p to select various profiles. I was able to manually edit one of the config/ini files to remove the Gmail account but that didn't help either. (I forget which I edited but I seem to remember it had an .ini extension.) In the end, I had to install a fresh copy of Thunderbird. That new installation locked when I tried to use the profile from the previous install.

I'm wondering if I can grab the address book--especially the collected addresses--from a previous profile and add the raw data somewhere in the new installation. It would also be helpful if I do the same for filters and calendars.

Thanks again.

DrP

> I'm wondering if I can grab the address book--especially the collected addresses--from a previous profile and add the raw data somewhere in the new installation. It would also be helpful if I do the same for filters and calendars.

Address book - all files that begin with abook and end with .sqlite in the profile folder

Filters - msgFilterRules.dat in the profile/ImapMail/<account> folder

Calendars - profile/calendar-data folder

Thanks Ed. I'll give this a try.