I use a licenced windows 10 pro. x64 Lmms window 32-bit 1.3.0-alpha.1 It would work fine, but on a x64 OS i would still recommend 64-bit LMMS. Thank you very much for the mda-piano, very nice sound :) So MDA WORKS -Good, that is proof-of-concept for VST in general ! That points at a problem with Ad...