All of my folders and messages survived the migration. My address book is gone. Nothing in it--no personal addresses, no groups, no collected addresses--except what I just added manually to send an email. And it isn't collecting addresses either. I am actually considering copying my address book from the old computer and pasting it onto a document to email to myself, I don't have time for this. Should I uninstall and reinstall an older version of Thunderbird, then download updates to the older version? Is this even a remotely possible solution? Very frustrated. Feeling like Mozilla is betraying me...