OK, I got my Step Dad to preorder Elemental Limited Edition for me with his credit card earlier on. However afterwards, his email address replaced mine on this account and he got the email about the serial key and stuff. I just spent ages trying to change email addresses as the page on Stardock's website won't let me enter my full password, so I had to change it first.
1) How exactly do I download the Beta?
2) How can I change my email address?
3) Is this the right spot to ask? 
Thanks!