Pre-Purchased but unable to play

[Magpiestripe]

I may just be an idiot, but I wouldn't mind an answer.
Apparently Darkspore is an open-beta on Steam until it's released.
I prepurchased Darkspore, and download it, but there's no way to open it.
So. How do I get into the open-beta? I'm extremely confused. :confused:

[spacemonkey9999]

The open beta is currently playable, guessing you have to download the actual beta version to play it.

The prepurchased version is the full game, which ISNT released yet, so you cant play untill it is. It's currently set for release on April 26-28 2011. But there's the chance it'll be pushed again. (apparently)

even if you bought the game you can only play the beta atm