I was procrastinating on getting this until your post. I felt I owed it to you for all your repaints. :biggrin-new:
Anyways, I have many other MV products that work fine in Win 8.1. This works just as well despite the lack of support mentioned by MV. To me Win 8.1 is like any other OS, but you just have to learn what it takes to get things working right.
I only had a chance to take a short flight with the F-100D and did a nice ILS landing at Boeing Field. Only issue I encountered was with the NWS setup - it seems different than the Phantom series in that I really didn't need the hotkey to activate it.
I'll do some more flights (after happy hour with the wife) and let you know if there are any (Win 8.1 related) issues.