Here the old builds of your favorite lofi sequencer still running on Windows 2000, XP, Vista and 7.

MSynth.1.5.0.alpha.msi
MSynth.1.3.0.msi
MSynth.1.2beta.msi
MSynth.1.0.2DEMO.msi
MSynth0.9build1.zip
MSynth0.9beta.zip