Thanks everyone for your great replies. I have copied and pasted all your notes, and saved them to a KV text file for later use. I have always just named them KV-[Alphabetically]. But if the files aren't named correctly in the first place it is a bit of a nightmare, in fact it is the worse folder I have for duplicates and incorrect naming.
I have just spent the last 4 months going through my entire karaoke collection, twice over, once by artists, once by track, and deleted 14,000 duplicates (from all my collection, not just KV!). It will be another couple of years now before I do it again, but I am now certain 95% of them are correctly named.