I purchased the CRJ 200 at on or about September 6, so am pretty sure it's the latest - that there have been no mods since I purchased it. Had the pitch oscillation problem severely enroute TJSJ - TNCM - about 30 minutes into the flight, at level flight at 15,000 ft. I read that the install package included a new .acf file and that would eliminate the problem. I backed up the old .acf file and inserted the new one from user modifications. The next time I booted up the CRJ 200 I got a message titled "Activation" and text saying "Unknown Product This product cannot be activated" Philipp suggested it might be the Gizmo plug in and sure enough, when I removed it from my X-Plane 10 folder the plane booted up fine. I have no Gizmo conflicts with any of my other aircraft. Any thoughts or suggestions? Paul iMac 27 with Fusion Drive 16RAM and 2VRAM Xavion on iPad3