I re-installed and re-licensed a fresh download of 2007 and I was able to update my online game

. I was going through my player shortlist and decided to unshortlist about half of them. While doing this the game crashed to the desktop (I'm using Vista). When I re-start the game, now every time I click on 'search for player' from the manager's page, the game crashes immediately.
Do I have to re-install and re-license again??