Did you get an answer to your query as I am having similar problems with version 5.0, and do not have version 4.12 to go back to.
Andy
kendallj wrote:
Recently I upgraded my Microsoft Wireless Optical Mouse Driver from IntelliPoint 4.12 to 5.0 with the result that VRPC-SE will crash when the 'Menu' (middle) button is pressed. The sequence is: Press "menu', VRPC goes into window mode, whole screen then goes black, VRPC then returns to full screen mode but often showing both pointers.
Removing version 5.0 and re-installing 4.12 cures the problem but I then loose the battery status feature of version 5.0.
Kendall