Just for Kicks folks...........and just in case...........when you de-install and re-install, are you guys activating the CRJ with the activation code? Are you all getting an activation window asking for an activation code? I was experiencing the very same issue you all describe here and I solved it by registering the product. I purchased my CRJ from the XPlane.org Store and I purchased the CRJ they never sent an activation code. I wasn't until I started having these issues that something "clicked in my mind" and I sent them an e-mail asking for a registration code which they immediately sent. The first time I installed the CRJ, since I had no activation code from XP.org I just clicked activate without entering a code and the sim took me right to the airplane (as if it had been activated), but with both PFDs black and no way to get them alive. So - again, this may sound "very basic" but I'll throw it out there!!!! Cheers! Dennis D. Mullert