Im pretty sure DX11 is the default setting for the install. You have to hunt for the DX9.exe file and either make a new icon for it or change it in the properties of the DX11 icon.
As for the "green" I just run what the game gives me. Sometime I'm on DX11, sometimes DX9. Not always looking for film for video, but I film everything for my own interest. Going away for a few days for my grand-babies 2nd birthday, but when I'm back I'll look into "Shader". To me the graphics of the game have always looked great. The biggest improvement I ever saw was when I got a new monitor

I didn't know what I was missing.
As long as people keep watching these and getting the word out there I'm going to say we are doing fine.