When you placed and confirmed your order, there should have been a link to download the A7 demo. I can't recall, but there should have also been an email sent with the same link. In a couple of days, you should receive another email with an attachment with your key file. Just place that file in your A7 folder, and it unlocks the demo. You'll have access to your username and password inside SED's About panel, and this will enable you to download the new 7.04 public beta. Your username/password will be available in WED's About panel after the upgrade.
Conitec can send you a backup CD; however it costs around $10, but I'm not sure why anyone would order this given you can burn it yourself as many times as you want. Most people, these days, have burners, and if you're a game developer it would be pretty silly not to have one. I suppose a dial up user would find it beneficial, but the downloads aren't that big.