How to install again

Since the Beta game play last year and the new Beta ranking special that was just announced, I lost my install of the game to a dead hard drive.
Trying to reinstall, but I can’t find the option to install the beta anywhere (only offers the full game and have to pay for it) and in my steam account it can’t download it, even though the key is associated with my account.

This method should solve the problem

i have the same problem…
i can not reinstall the beta :(…