You can upgrade to Pro by contacting your Account Manager or through your customer portal.
To upgrade yourself, visit atmosphere.tv/login and sign in with the email address used when you created your account. If you don’t remember your login credentials, click the "Forgot Your Password" link on the sign in page to receive an email link to reset.
Once you're logged in, navigate to the "Digital Signage" tab (under Advertise) and click the "Access Your Billing Portal" button. Once in your billing portal, click "Update Plan" and then select Atmosphere Pro.