The X-Plane Website has an updated version 9.20 RC-1 of this flight simulator for Windows Linux, and Macintosh. Word is: "X-Plane 9.20 Beta-1 is here now, with tons of features that people have asked for, and with many features from 9.10 that are designed for FAA-Certified flight-training. X-Plane 9.20 is one of the more FAA-Certified-feature-packed releases we have ever done." Thanks Gamer's Hell.