OK this is the follow up, just for completeness.

You need to delete both files.

Deleting the intrface.bbw file got my screens working again. but I was getting error messages that there was no bass drum, snare drum, hi hat, etc assigned to the midi drum synth.

When I went back and deleted the intrface.bbw and also the mysetup.dk the error messages went away.

Suerte!

Greg