Cowan Simulation has been steadily releasing the free updates for the fleet. The 500E can now be downloaded from the .org store or Joshua’s website directly. You’ll have to log in on the site where you bought the 500E, of course.
This update includes all new FMOD sounds and all the new features like new lighting, flight model, rain effects and more.
If you don’t have the 500E, you can buy it right now and you can download both the X-Plane 11 and the X-Plane 12 versions.