Since some time (The Reach or Western Skyrim, IMO since The Reach but not 100% sure) this feature is unavailable, at least for me. Two displays, nVidia card, DVI 24" and UHD HDMI 26". And the game runs fullscreen only on 1st monitor (24"). Now I run it in windowed mode and on every start I move it to the second monitor.
Can this feature be returned to previous state? Is there an option in the user settings or some other workaround?