If nothing else works, submit a Support Ticket. There was a change in the KMA "header" between 3.321 and some release after that, at least by 5.00. It could be that some headers are "old" and did not convert (which we do automatically). It's a long shot, but Bryan could help you best.
We may need an example KMA file that does NOT index in the Songs Database to study its header contents.
