Have you ever opened a program just to have the interface open off-screen? I know I have.
Here's a simple trick to get around this. First make sure you’ve alt-tabbed to the window, or clicked on it once to bring it into focus. Then right-click on the taskbar and choose Move
(Window Off-Screen/Behind Taskbar)
(Window Selected And Right Clicked)
Now you should see a Cross come up as your pointer. All you have to do now is press the Arrow keys on your keyboard to move it back onto screen!
***NOTE*** As far as I know this should work on all versions of Windows.