When Wings3D opens, the geometry graph appears in the incorrect location. Its selection bar and close icon is hidden under the main window's menu bar, such that the geometry graph cannot be either moved or closed. The only way I've found to get around this problem is to re-install Wings3D, if I forget to close the geometry graph before exiting.
Screenshot
Supplemental information: This seems to be an issue with Vista. The program works correctly on my machine running XP.