Not sure if this could be helpful, however it might shad some light on the matter. Checking the application crash data inside Windows Event Viewer.
http://www.codeproject.com/Articles/597856/Using-Windows-Event-Viewer-to-debug-crashesAgain I'm fishing
Mal
EDIT- I'm just thinking , if there is no error or exception message from the engine and no errors in the log file, maybe windows recorded a exception code for the crash that can narrow the issue down.
