I've tried anvil before, but it's a bit... well, complex. MIDI maker is extremely simple. My way of keeping the trial forever is having it stored on a VirtualPC savestate, but it's still not as good as it could be.
Where can I find this Midi Maker? I tried Anvil but like you said...kinda complex and would like something more user friendly.
Currently LPing: Higurashi - When They Cry (Steam) / Legend of Zelda - Temples of Turmoil Revamped 2017 (ZC)
Next LPs: A Boy & His Blob (NES) / Legend of Zelda - First Quest Layered (ZC)