MIDI Madness

Hello,
Anyone using this software? Due to a health issue I can no longer play my instrument of 40 yrs (guitar) so am exploring ways to make music without playing. Considering this as a tool for generating melodies. Trying the demo now and I like many of the features.

The install consists of dragging the dll into the vst folder structure. It scanned ok and I can use it to generate MIDI (limited to 1bar in the demo), but the MIDI will not produce sound while inside MM, altho I can drag the clip into splat and it's functional there.

Not looking to spur a major investigation from readers, since I've not provided a lot of technical details about my system, etc. Just wondering if anyone might know from their experience. Thanks!