Main features:
- high resolution (640x480) support
- restored blue-coloured HUD font from the original release of Harmony
- improved OPL music playback thanks to ludicrous_peridot's updates to Allegro code, and DMXOPL
- binary release (v1.00): muse100.zip
- source code (includes Allegro library code ): muse100s.7z
I have no real hardware to test this on, so I'd appreciate it if anyone gave it a spin on something that can do OPL music.
The other changes are mostly cosmetic, I have restored the original blue font for HUD messages and menus from the 2009 release, and added proper lumps for MBF extended menus:

I also fixed the colours on the minimized MBF HUD (Harmony uses a custom palette with a completely different order of colour ranges, so I had to "rewire" them to display the intended colours):

A selection of in-game screenshots can be found here.