If it helps, same thing just now, flew a long and nice flight in career mode, parked the aircraft, APU and APU GEN running, cutoff and crash to desktop after the engines spool down and the "bonanza" of messages for CAS passes.
Log.txt
CL650_Log.txt
I can currently reproduce a crash in career mode when landing and parking the challenger. When I shut down the engines via fuel cutoff, the sim crashes to desktop and I get the error reporting tool. This has happened three times in a row. I've attached the CL650 log file.
Cheers,
Steffen
CL650_Log.txt