If I shut down thunderbird by mistake and restart it, my Gmail can't be read. There is a blue line at the bottom showing it is trying to do something, but it never finishes. I close every running program, reboot, and it works fine until I mistakingly shut it down again. I have several accounts and get hundreds of emails every day. I try to keep deleting them, empty trash, and compact folders. My Imap folders in my profile are huge. Many gigabytes. I plan to migrate to a new computer and don't want to move whatever is wrong to the new computer. This means I will have to start fresh, set up the accounts, fix the signature files, etc. Then I can export the address book and import them to the new computer. This will be very time consuming. Is there some way I can delete the saved emails from the profile file and copy the rest of the profile over?