If you have pieces of the GUI missing, it might be your computer display resolution is not matched in Windows, and if you are using a WS mod that is of a higher resolution than what your display monitor can show, then you'll have pieces of the GUI cut off, either at the top/bottom, or left/right, or both. Kind of like "letter-boxing" a video on youtube. Be certain your display is correct for the WS mod, especially the ratio (like 5:4 or 16:9).