Decided to mess around with the Orbiter beta. With The DX11 w/terrain I get this odd error when I try to enable the D3D11 module. I have no idea what it means, but it prevents the VideoTab from ever appearing.
This is with Win7Pro64 and Orbiter build 130101, or whatever the latest version is on svn://orbithangar.com/orbiter, so maybe it's my own stupidity here trying to make it work with too new of a beta. lol