Hi Max.
I seem to have located the issue causing the crash and it has nothing to do with a plugin, LUA script or scenery item.
If i delete my controller profile folder the aircraft will load in both the new install and my original.
The cause seems to be the use of my Thrustmaster Warthog. As long as I don't use it both the A300 and A310 will load without issue. (Thankfully I have a Honeycomb setup for airliners so can swap over)
Could someone look into why the TM Warthog is causing the aircraft to crash on load?