1.6.1 broke the game

crash on startup, sent many crash reports

Assertion failed: [File:Unknown] [Line: 198] Unreal Engine is exiting due to D3D device being lost. (Error: 0x887A0020 - 'INTERNAL_ERROR')

Oh I solved the problem by turning off the sharpening filter in the nvidia control panel, apparently that breaks the game.

Nvidia released hotfix driver 445.78 which fixes this issue.