There are three areas of setup required:
The first step is to register on this website. The account will allow you to handle home creation, management and billing.
The file you download must be copied onto your running raspberry pi and contains a readme on how to get the software up and running as well as how to connect it to your account on the website.
The final step is to get the apps.
After downloading them, sign in with your account and you are good to go.