I have a crappy laptop with Win 10. I believe I installed the DX fixes a while back for another game, or removed, dunno. Prior to seeing this thread, I was not able to run setup.exe but the game works well enough just by copying the folder FLT3 to the hard drive and running the executable directly. Switching apps can mess up the view, but if it happens while flying you can call the map with M and then exit the map and the view will be restored. My main issues is that the taxiway lines and ground textures did not appear after landing at SeaTac, though they show up if you start from there.
any ideas? Also, how can I get the airport diagrams?