Hi there! When I fired up the sim once more tonight, I realized that the CRJ is working again. When I thought about what could have caused this issue, I remembered that I uninstalled SkyMaxx Pro one week ago, and with it the Gizmo plugin that the CRJ obviously needs. Today, I bought the LES Saab 340A at X-Aviation, and with its install, the Gizmo plugin came back, so the CRJ loaded without any Problems again. But when I had a look at the log file, I recognised that the "license check" appears very often in it, is that correct?