The Pinball Wizard machine appears to have an intermittent trough problem. I played a ton of games on it yesterday, and it gave me an extra ball in multiball once and killed the current ball (flippers dead/bonus count) when I drained down to one ball two times. That was relatively early in my run of games, and it played perfectly after that for quite a while.

If you delete a file, is the game smart enough to play a different clip instead? Or would it just play nothing?

If the latter, you'd probably want to copy one of the non-offensive clips and give it the offensive one's name.