Don't have a place to host it just yet. I am still waiting to hear back from Cakewalk on this issue. I got a call last week, but nothing much since.
 
I know they are busy, but not hearing anything constructive for several days? The hope is fading...

Sorry to bang on (but that is what I do, I can't help it) but you looked at the Windows event viewer for clues?

I haven't experienced any crashes on audio clean-up, however, it does take an awfully long time....
 
There's no evidence of any activity in it's dialog, so it's possible to mistakenly assume it's dead... Could use a spinner/activity indicator there...

My issue is not the clean-up though. It is searching for missing audio in a project. There is a progress/working indicator at the bottom of the search dialogue. If you repeat the recipe I put forth, you will see it. It is basically a directory listing and progression. It changes for each directory processed.

STILL waiting to hear back from TS after pinging them daily.