We are continually evolving the products and services we offer. These innovations mean that we periodically transition away from selling or servicing certain hardware or software products. In order to focus on other software products and services, including the free version of GoPro Studio available here, GoPro has ended development of GoPro Studio Premium and Professional. Beginning June 1, 2015, these titles will no longer be available for sale on CineForm.com. 

GoPro will continue to provide support to users who have purchased a license for Premium and Pro, up until Dec 31, 2015. Support will be limited to answering questions related to workflows. GoPro will not be creating new builds to address bugs, support new operating systems, or to support new graphics cards. If you have support related questions, click here to contact customer support or use one of the links below.

More info - http://cineform.com/gopro-studio-professional