Ok, I put the plugin back in its place and as soon as I was in the BN-2T cockpit, X-Plane 12.1.4 crashed without any notifications.
The Log.txt is attached. The last few lines show the following:
2025-04-28 13:37:16 ISLANDER-T[Main.cpp:421]: BN-2 Islander Activated
2025-04-28 13:37:16 ISLANDER-T[Main.cpp:425]: Output Dataref/Command Files
2025-04-28 13:37:16 ISLANDER-T[generalSystems.h:934]: New Livery Loaded
--=={This application has crashed because of the plugin: BN-2T Islander by TorqueSim}==--
(Art controls are modified.)
--=={FILE: D:\Games\X-Plane 12\Log_ATC.txt}==--
Is that caused by the livery that was loaded? I guess the better thought is to try again with a default livery and see. I will report back with the results.
edited to add: I got the same ctd results with the default skin selection for the BN-2T, so it wasn't the added livery.
Log.txt