After your 15 day trial period ends, you need to enter the license key that you either purchased through the online store or from your local reselling partner.
When you have logged into your account, choose your avatar (top right of screen) and click on “License”
Enter the license key that you purchased, and click “Submit”
You will see the current state of your license, in this case we are in Trial mode. Please note, it is possible to upgrade your existing license through the store. To activate a license, type the license into the box and click “submit” If it is accepted, you will be logged out and asked to log in again.
When you log back into the software, you will see the license state has been updated.
Please note, you are only able to add the number of Playback Devices as your license key supports.