Thank you for your interest in RadControls Prometheus.
The trail messages pop up whenever a free beta is being used. We provide complimentary licenses for RadControls Prometheus to all customers who purchase a RadControls for ASP.NET license. This complimentary Prometheus license is the same as the free beta, but no trial messages pop up. Other than that the functionality is the same.
If you decide to go ahead and purchase a RadControls for ASP.NET license, I would suggest that you purchase a Developer license with Subscriotion($999). With the subscription you will receive the next 3 major product upgrades including the full suite RadControls Prometheus for free. The suite is expected to come out with our Q1 2008 release.
Let me know if you have any questions
the Telerik team