Thanks egun for looking into this.
I don't really get your last paragraph Richjoh...

What's going on in the US ? A conversion is taking place ? GO OBAMA !
More seriously, I'd like to get in touch with you to have an overview of all your issues with your conversion to version 7. It seems you've been having issues with compatibility importing your mediabases and playlists.
But as you were previously told we can not perform any maintenance on previous versions and - you can install version 7 to another directory so as to test it out and find out what precisely are your issues in upgrading.