High-end Update not available

I purchased the HB Highend theme in 20215 from Mojo Marketplace. I have been using it since and have never been given an option to update. I am stuck on version 3.1.1. In Motion Hosting told me to contact you for help. I have the purchase code and email receipt. Is there any way to update or import into the current Highend version? If so, how? Thank you.

Highend – Ultimate Multi-Purpose WordPress Theme
Price: 49.00
Purchase Date: 10/25/15 3:02 PM