Hmmm ... there I could only find the sound output (Soundcard, Directsound, Wasapi and so on), but not an option whatr to use to playback MIDI files (Microsoft GS Wavetable Synth, VirtualMIDISynth, Fluidsynth, ...)
The only windows player able to play them is Deliplayer and that one is about 20 years old and doesn't work well with Windows 10 (for example every time you start playing a track it mutes). Also it doesn't support the new compressed version.
Would be nice to be able to listen to these great tracks again in Aimp.