Thanks for your kind assistance, Goran. Unfortunately no change, Log.txt is attached.
The attached is with an untouched fresh TBM install - but trying to troubleshoot earlier, I pulled out X-TCAS and the crash still seemed to happen but complained about the next plugin in the list, and so on as I continued doing the same. I did get it to not crash once by temporarily moving ALL the plugins folders out (including systems) but of course had some weird behaviour in the sim.
The TBM900_Log.txt and Gizmo logs don't seem to have been touched in any recent launches, modification date is still from yesterday, but both are attached too, in case there is anything there.
Log.txt
TBM900_Log.txt
GizmoLog.txt