It was the startup state that i was struggling to get working. It looks like my installation must’ve got corrupted somehow, as the update corrected it.
Prior to the update, the engines weren’t starting as they should, at the first time of loading, with the “ready to taxi” state selected as the startup state. i was having to restart the flight for it to get into the correct state.
Now however, the aircraft starts ready to taxi, as the name of my selected startup state suggests it should.
I should now probably stop being so lazy and set my startup state as “cold and dark” 