Well thanks for clearing that up guys. Its sad that the tool is doing the exact opposite of what I'd hoped. Truth is, a lot of times the way I leave a project last is the way i want it to stay. If I have a lot of pieces I haven't bounced, its usually because I see value in being able to use those pieces for other mix situations. But I'm guessing there are dozens of bad takes on punch-ins that might still be there even if I've deleted them. So all i really wanted to do was delete unused clips in a current folder before I button it up.
From what you guys are saying (and it looks to be true), the tool will search my whole HD, and show me tons of "unused" files, which in fact might actually BE in use by projects in OTHER folders. This is completely ridiculous. I use per-project folders so if I'm cleaning up a project, everything that could be discarded is going to be right there, and everything that shouldn't be discarded is elsewhere.
So the truth is, not only doers the tool do the opposite of what is desirable, but its also true that the advice Sonar gives, about the tool being the ONLY 'safe" way to delete files, is also a complete LIE! The ONLY safe way to pick files seems to be to pick them yourself from your project AUDIO folder.
From what you guys are saying though, its probably best to save the whole project into a fresh folder, use the option to copy ALL audio files used by the project, and then just delete the whole original folder. Does that make sense?
It would be nice if the authors would create a "Clean Audio Folder" tool that makes more sense, but sadly it happens quite often that Cakewalk just ignores what people want. Grrrr!