Deus Ex Human Revolution: small guns and hands

Hi! I can not get DEHRDC to run as it should. I use the built in VorpX profile, and set resolution in VorpX, and it almost works. The 3D looks awesome, but very weird. My gun is very small, like it’s a 2D image squeezed in on the bottom of the screen. When I go into settings the game will not allow me to turn on DX11, nor depth of field, or basically anything. If I change anything I get the message that it will require a restart, but then everything just resets to the way it was.

Anyone know of a fix for this? It is one of my favourite games of all time, so I hope it can be resolved.