I've posted MMA 20.12.2 on the website:
https://mellowood.ca/mma/downloads.html#developerPlease read the website blurb for what's new, etc.
Currently, I am writing a few more documentation files for groove writers and to clarify some of the issues with 6/8 and other time signatures ... this will be in the next release.
You comments and suggestions are always welcome and appreciated.