Moving Thunderbird Profile from one computer to another - SOLVED

[Falcon]

Well, I never was able to figure out why I was having all the trouble with email accounts after migrating to Thunderbird 60, but I did find a solution in the end. I went back and used the .profile.ini that was generated when I first installed Thunderbird and I was then able to re-create the email accounts that I needed successfully and they work fine. I wasn't able to get my emails and address book from the desktop computer and put them on the laptop, but decided that 90% of the emails that I was going to transfer I could live without and a large percentage of the contacts in my address book were old and no longer needed. So at the very least, this gives me the opportunity to clean things up before moving the desktop to MX Linux.

Thanks to everyone who helped me with the various issues I had that are listed in this thread.