Hi,
something that confused me for a while: to get the claw (whatever red dot or yellow hand) centered on the pieces it must grasp, you need to keep the default window size: there is no scaling applied to the claw position computation.

Usually I set the device property "start out maximized" to true (in the display tab of the properties); you need to either unset it, or once the window appears, reduce it to the default size (using the usual windows button or menu).

Hope this might help some of you...
MfG,
Eric