There's a special area for the customers at our web site: Customer's area. You should register there if you did not do this yet (you did not become registered there automatically on purchasing), confirm your e-mail and login. After that you'll be able to download the latest version or one of the previous versions.
Note that if you register in the Customer's area with e-mail that differs from the purchase e-mail, you should click the "Find my orders" link and submit a request to assign your order to your account.
Customer support service by UserEcho