As of April 28, 2015, the Kubota DASHBOARD for Photoshop requires a subscription to use it. Users who are not subscribed will not be able to log in and will receive an Activations Exceeded error. Learn more here...
The Kubota DASHBOARD 4 is compatible with Photoshop CS5 - CC, not CC 2014 or higher. Creative Cloud subscribers are able to install CS6 through CC 2015.5 versions and run them concurrently if they choose, thus you can install Photoshop CC and access the DASHBOARD while continuing to have the latest version of Photoshop installed as well. Instructions on how to do so HERE
Kubota DASHBOARD 5 Beta version is now available and is compatible with Photoshop CC 2015.5. More info can be found HERE