I had this issue afther update;
Screens flicker after starup and soon notification appears saying;
CANT INITIALISE RENDERER DIRECT3D INVALID CALL
Well, I also fond out how to fix it;
Change <r_fullscreen val=“1” /> value to 0 @ user_config @ dir
Ps. Fun game, thou tier 2 is way harder, sometimes impossible, then tier 1 at PVE.