I have installed the tool and the software runs, but there are no instructions as to which keys to use to indicate a correct answer. The cursor can be moved using the arrow keys but neither the Spacebar, left mouse key or enter key work to indicate a correct response. I am running the tool on Windows 8.1. I have run it in Compatibility Mode for the following OS : Windows XP SP 2 & 3 and Windows 7, still with the same problem. I'm sure I am just using the wrong keys.