To access your download, you need to head to your customer dashboard at JVZoo: http://customer.jvzoo.com/
From there, you should see any purchases you've made through JVZoo listed in boxes. Clicking on the green "View Details" button will take you to a second page that lists more details.
(Make sure you're subscribed to receive notice of our future products.)
Scroll down and you'll see another green button, this time titled "Access Your Purchase." Click that.
You will be taken to the SchemaPress Download Page, which has complete instructions on accessing, downloading, installing, and activating your new SchemaPress plugin.
That should take care of it!