Fix for "FMG is damaged... move to trash". Download the BatChmod app. Drop FMG in the file path and select all options: change permissions, clear ACLs, unlock and clear extended attributes (xattr) and also check the implement on included folders and files. BatChmod is a lifesaver when some apps or packages won't open.
I ran FMG on a MacMini late 2009 with OSX Mojave 10.14.6 installed. I've played around for a bit and it seemed stable. FMG is strange, but I like these kinds of experimental apps that bridge music, art and the natural sciences.