game won’t play after adding user account to XP

I have had Jeopardy Deluxe installed since 2004 It always worked fine Recently my son added a user account to my laptop so he could use a seperate itunes account Ever since I can only play Jeopardy if logged into his account How do I rectify this without reinstalling the game I have lost the code that was emailed to me at purchase i purchased the game from zone com which is now evidently absorbed by MSN and they have no record of my purchase