Hi there i might be able to help anyway if you want to locate your vst plugins u can check its location on drive c/: program files then magix folder or go on the add styles on mmm16 and browse folders ok m8.
Thanks for your help snakeman82 - as you suggested I tried adding an audio effect in the magix MM16 folder but I cant get it to show up in any menus in the program. I can add vst instruments no problem