Voice over changes cause sound track to disappear

[nomp...@gmail.com]

Sporadically, if I change a voice over on a slide where other voice
over slides after it, my sound track will disappear. Usually it is
just the last soundtrack and I can readd it.

However sometimes it causes ALL the soundtracks to disappear. When
that happens, ProShow will now allow me to add the soundtrack back into
Show Options.

If I try to add it by dragging and dropping in onto the sound bar, I
get a message asking if I want to replace the existing song, even
though none shows up in any of the audio options. If I say yes, then it
adds a series of tracks from the directory in which my soundtrack can
be found, but not the soundtrack I have selected.

I have to hard boot to get out of the program, and restore an earlier
version of the show from my hard drive (I use Go Back). If I try to
restore one of the ProShow backups, nothing happens. It can take me an
hour or more to restore.

Any similar problems/solutions?

[nomp...@gmail.com]

I suspect some sound indexing file has become corrupted, and there is
a way to delete and regenerate the sound file. I've tried deleting the
pcx file and regenerating the show, but it doesn't resolve the problem.
Ideas?