One more update, fixing a few things, adding a few minor features. (Improvements? You decide!)
Thanks again for all your comments and suggestions. If you've made none, but downloaded ProjectScope anyway, thanks for that too! Apps are made to be applied, I always say (starting about 10 seconds ago).
The latest incantation of ProjectScope allows you to copy a list of items to the clipboard (right-click), from whence you can paste into whatever. The items are tab-delimited (the lists, not the user info), so they should flow into, say, a spreadsheet.
KPerry, will that work for you? There's an option to fill in audio file file information (in addition to just the file names). (More information in the future, I suppose.)
Bitflipper, with that shopping list (all good), I'm tempted to promote you to head of R&D. Or maybe marketing.
VariousArtist, your idea is good direction, too, I think. I do that procedure all the time (as I'm sure a lot of us do), but it's half by hand. (Example: "ProjectScope show eight audio files belonging to this project, but file explorer shows ten wav files total in the directory. Which are the two unused files?") Having the whole procedure of moving off the superfluous file with a click would be sweet indeed.
I think a full report print feature would be cool. Why? Actually I don't see a utilitarian need for it, but other DAWs don't have it, so we should!
Wait a sec---did I say "incantation"? I meant "incarnation". You knew that, right?