Log into your account.

If you forgot your password, you can get it here:
http://resellrightsforsale.com/forgot_password.php

Once you are logged in go to the "Your Account" tab at the top of the page.

In your account home select the link for "My Orders".

Orders are listed with the most recent purchase first.  Click the "View Details" link for the purchase you wish to view.

You will see an invoice with your purchase information and the name of the zip file.  For example:
Your_Road_Straight_To_Success.zip

Click each link to download the zip file.

Download links are good for 7-30 days, which should give you plenty of time to download all your products.