1. Click the link above and sign up for an account with simvoly.com
2. Select a template for your website (You can change it later on without affecting your content)
3. Click on "Dashboard", then "Billing"
4. Select the "E-Commerce" plan.
5. Scroll to the bottom of the page and click on "Use Promo Code" and enter your AppSumo code.
When I did that I got the following message from the simvoly.com site:
"Your payment was accepted successfully!"
COOL!!!! Thanks OP!!!!