Daniel, make sure you have the latest version of XPlane. Its working fine on my end, I'm using the same package that was uploaded. Hey C47. What are your computer specs and rendering settings? Its running pretty good on my computer vs other add ons. My system is pushing 6 years old. I'm running a AMD Athlon 64 Dual Core at 2.40GHz with 3GB of ram and a 7900GScard with 256MB of Vram. The Cessna was updated using a Nvidia 6600 card.