I've been using your program for well over a year already, mostly for general playback of XG and GS MIDI music outside of games, and it quickly earned my approval. At this point, after all the improvements and feature implementations it's gone through over time i don't think there's anything better suited for my purposes, at least on Windows systems. So thank you for developing FSMP in the first place.
I have several questions, mostly concerning the maintenance of the program itself rather than new features (probably because i don't have much to suggest, as fuctionality-wise it already covers most of my needs, on top of you not having much time to dedicate to it recently)
1. Do you keep the archive of previous releases public and online? I wasn't able to locate it myself. Even though at this moment i don't really need older versions, since the latest works perfectly, i think it's good to have the possibilty of downgrading if such a need arises, for whatever reason (compatibilty with older systems especially comes to mind, although FSMP doesn't seem to be in danger of breaking it anytime soon)
In case there's no such thing/you don't plan to maintain it, i'm thinking of archiving each release on my Archive.org profile (to my understanding the license permits redistribution - correct me if i'm wrong)
2. Have you ever considered switching the licensing model to open source? Setting my preferences aside, i think it would be actually beneficial for the community of its users in the event of you ever deciding to halt or abandon the development indefinitely, so it wouldn't ever end up stuck in eternal limbo (which would be a very sad perspective, given how good it is)
3. Now to actual feature request, i briefly skimmed through the thread, and remember someone suggesting adding full support for multi-port MIDI sequences, using port preference metadata to map additional 16-channel domains (including external MIDI outputs, aside of the internal BASS engine). I know this was one of the most complex and unlikely ones to ever see the light of the day, but just for the sake of it, i wanted to say that you have one more person who's interested in it now.
4. Out of pure curiosity, as i don't care for that component myself (i'd rather use trackers to write and play module music) - why is the mod2midi even a thing in FSMP? MIDI and module music being inherently very different technologies with different goals don't translate between each other well, so the mere idea of mod2midi had always been perplexing me.