Same issue on a Lenovo T440s laptop with Win7 and SU2014 Pro. (My office setup has two other screens connected. I use SU on the 3rd screen. Now I'm home trying to work on the laptop screen.) Problem is right clicking taskbar and 'cascade windows' or any of the other window arranging options do not work. SU main window is still on the non-existence additional display. I only see a few floating windows.

Has anyone come up with a solution yet? Please help. TIA!