I've seen a couple people with this problem so I thought I'd make a post.
This won't let you "add the game", but it should let you use your preferred graphics card. Go into the nvidia control panel under "Manage 3D Settings" and set your "preferred graphics processor" to your nvidia card. Then go to "Configure surround, PhysX" and under PhysX settings on the right set your processor to your nvidia card and click "Dedicate to PhysX".
Hope this helps you out!