If you have played the DarkSpore beta, you might be in luck. If you participated through the beta DIRECTLY through the DarkSpore.com or Beta.DarkSpore.com website, all you simply have to do is launch your game and you can patch your game from the beta version to the final version. There is no need to uninstall the game.
You simply need to associate a DarkSpore Game Key with your account and play 
.
If you got the DarkSpore beta through Steam, there may be a chance you need to uninstall the game and do a complete reinstall.
