Thanks for the reply. I will check out that other thread. Meanwhile, Deluxe Galaga
IS of course a time-honored classic and masterpiece which I have just redownloaded on my own... However, it really doesn't have that much to do with the original arcade classic by Namco, nor any of the official sequels (Gaplus, Galaga 88 arcade, Galaga 90 NEC console etc.) But I suppose that if I really have a hankering to revisit those, they are right here in my MAME folders
and in MagicEngine.
Again, thank you kindly for the ideas.