I think they might have some records to fix in their customer DB. For example I got the email in to address X. Elemental WoM is recorded in my Impulse account under address X, and the account itself is under address Y. The game is NOT listed under my games at stardock.com when viewing the account of address Y. In addition, there is no Stardock account for address X (the WoM account). Hence, I can't download the game, although I am qualified for the beta and even got the email.
So, I am waiting for support to answer my query about this issue. I am afraid that support of Stardock is a little busy at the moment...