Oh boy Karl.. Yes have heard Nick say the same to others concerning addons by xml- That order doesn't matter.. But my pea brain keeps saying that it still makes a difference, especially for LC type scenery pieces- IE: Default Terrain/bases, LC, full fat regions, Tongass etc, where we have always thought that their layering position has to be correct and it does matter.
Certain things like the default pieces/bases/terrain are supposed to load first and will lay odds that OC (Orbx Central) has messed up your scenery.cfg for one, and for two, possibly your terrain.cfg.
Also, you updated GPU drivers, so might be best turf your old shaders folder, sceneryindexes64 folder and prepard3d.cfg and let the sim rebuild them all with your new configuration. (after check your terrain.cfg but until the orbx stuff is correct
I guess as long as you didn't see issues in your sim it doesn't wouldn't matter but continuous CTD etc, something is definitely messed up. Best to go back to vanilla I think to get that working as intended before doing anything else with orbx stuff etc.. very frustrating. (If you use Lorby, (I won't), but if so turn it off cause it is just as bad as orbx central for messing up correct layering). (I'll shut up now.).
If there is anything that we can do to be a help just yell or email and can try to help via voice comms... etc.
Norm