:-) You are right, my mistake. Just edited ;)
Your mistake will stay forever in my quote. Muhehe!
In the mail you get a link to the site where you download it. On that site you type in your order number and the password you chose when you bought it. That should give you your serial key.
The order number is in paypal receipt too but it can't be used until you get that mail.
A lot of work for my Internetz tomorrow, 3gb patch for Skyrim and another 7 for Space Marine.
Just started downloading and it's 9076MB.