One way would be to locate your product access email you received from JVZoo.  In it you will find a link to access your purchase through their portal.  Another would be to locate your login details email from Shopify Store Pro.  In it, you will find the member’s login link (http://members.shopifystorepro.com/) and your username and password.  Please be sure to check your ACCESS email address you provided on JVZoo during purchase.