In the last screenshots you are using the browser instead of the actual app. It should work and automatically set the right settings if you open the app.
You should use OpenGL if you are using the NXT client since NXT is NOT using DirectX.
DirectX is only if you are using Java client with DirectX setting or running NXT in safe mode.
I have this issues with the app, I have just installed it today and I have no issues playing other games, hell even games like Battlefield 1 and Titanfall 2 that are graphic heavy...
I will post some screenshots of my settings .
There you go , please help me solve this, thanks in advance.
Best regards .