Ok, I tried this and it worked. I liked the product quite a bit, so I purchased a lifetime license. So I have an additional related question now.
I created my "Arcade" platform list, which consists of a list of games using a mix of emulators (i.e. some using MAME_145, some using MAME_202, etc.), I would now like to be able to filter this list by emulator (say, if I wanted to do a bulk edit of the command line for Mame 202 games, or do a bulk migration of Mame 202 games to a future version of mame), but I don't see "Emulator" as a filtering option in the LaunchBox pull-down list. Perhaps I'm just missing it? A work-around is to add a custom field called "Emulator", always fill it in, and create an auto-populate playlist from it. That's fine, but its extra maintenance that I'd like to avoid if possible.
Thanks!