I have a dumb question: I was wondering wether the

Speaking from a personal knowledge standpoint (meaning that I am not speaking from actually knowing PMDGs thoughts on this, just my own conjecture) I couldn't possibly see why it wouldn't work on any version of FS9.

Well, simply because the fs9 pacth replace some of the .dll as well asthe fs9.exe, and this can make a difference.At least is it what I understand of the patch.Example is the FSUIPC module: those who installed the patch had toget the latest 3.40 version.