Why my Artists thumbs were lost?

I migrated from EDEN to FRODO 12.2 and the music database was not ported.

1. I had to rescan the library
2. Artists thumbs were not transferrred from Mymusic18 to MyMusic32

Now everytime I want to see an artist information a input keyboard is opened with the name of the artists.
Not that I would like to set the thumbs manually AGAIN, after I spent countless hours doing it in EDEN

Is there a way I can transfer the artists records manually from the SQLITE database Myusic18 to MyMusic32?
(I am not very SQLITE savvy, I got the Firefox extension to manage SQLITE files)