Hey,
I guess your game looks streched?
You have to manually edit options.ini and enter your screenresolution and aspect ratio. After that you need to make the options.ini read-only, otherwise aspect ratio will reset to other values and you have a streched picture again. If you need to change something in the menu, you have to remove read-only, make the changes, change the 3 displaysettings in the ini and restore read-only-status. Its not perfect, but it works.
If you still get a distorted picture, try set your refresh rate to 60Hz.
Thats from my options.ini (change the marked values):
[GraphicsOptions]
DisplayDeviceID=0
DisplayWidth=3440 <------
DisplayHeight=1440 <------
DisplayDepth=32
AspectRatio=2.388889 <------ Displaywidth divided by Displayheight