1. Send us a request to support@gauchoplugins.com or click "New Support Ticket" above. 
  2. After your BETA access request is approved, login to your site, and go to Payment Page > Account. 
  3. Click the checkbox to Join the BETA program.

When a BETA version is available, you'll see this option to upgrade:

You'll also see this notice to upgrade on the Plugins page: