I purchased X-Plane 11 via Steam, and have download a couple default skins, and the Zibo 737. As well as the latest Navigraph airac cycle. I have been unable to get ANY of them to load in-game. I checked and double checked my installation process and everything looked good. I wondered if this was a Steam issue because I can no longer access my FSX-Steam addons anymore since I got XP11, but Steam support just directed me here. Any advice?