Well, after tried uninstall the AS 2.0 Oslo scenery (2nd time), restarted everything, rebuilt the database again (with NO Aerosoft Oslo installed) and with no warning or errors, -THEN start installation again and got NO positve result in EFB2 (even P3D4 show new terminal and stands was there!), and with 2 findings in database - I just wanted to try something new in my frustration... and it works. Otherwice I'm agree with you, I barely use the Migration Tool anymore, but it happens.... especially if I don't find the updated scenery for P3D4...
Jarle