So post SU8 it doesn’t crash when the aircraft is cold and dark any more but turning on the APU does cause CTD. (Standard A320 at gate A13 live weather & Traffic. )

Sorry but this is not an acceptable answer George. You have our money here so cannot be so dismissive and hope MS ‘fix something one day’. I have also just spent nearly AUD$30 on this and get exactly the same issue as the OP. When landing or starting at LGAV, after about 5 mins it starts stuttering ...