Rated 5 out of 5 stars

Excellent tool. I used it to migrate a complete Thunderbird profile (multiple POP3 and IMAP accounts as well as custom addressbooks) from Windows to Linux. This worked flawlessly!

This review is for a previous version of the add-on (4.0.4). 

Fritz
Thanks ! very glad it's working for you lots of changes to keep up with!
Christopher