Hi @FS++ ! I just try out MCX but it will just not start. The "Connecting to simulator..." start window is popping up, "OK" is heared, ATC chatting sound is run in the background and then it just disappears. I cannot find any logfile, there is no "error window", no entries in the Windows Events Log can be seen and also there are no entries in the Xplane log. Starting the app from the commandline to see if the executable outputs sth. on console does not work - it even does not present the start screen. After fiddeling around, updating everything, exchanging the dll I found in this chat, I consumed about 10 xPlane startups which leaves me with a not running demo app and just 20 startups left... I appreciate any idea! :-) THX in advance! OS: Windows 11 Home Version 26H2 OS build 26300.9550 Windows Feature Experience Pack 1000.26100.372.0 xPlane: 12.4.3-r2 Plane: ToLiss-321-XP12 1.9.1 + ToLiss-321Neo MCX: 1.8.02 (test version day one)