Vincent-Allain wrote on 6/2/2019, 8:31 AM

I cannot completely answer your question, but two things of note: the free version of MMM does not allow external VST's, and also there has to be a 32bit version of Valhalla. I have heard of a workaround to make 64bit VST's work in MMM (which is a 32bit application), but I have never tried it.