Invalid License - A valid license was not found.
The most common reasons for this error are no license is installed or an incorrect hardware key. The license is tied to the instance name where the SQL Sentry database resides. To get the instance name, connect to the server where the SQL Sentry database will reside and run the following query:
The primary license contact may update the hardware key at any time by visiting the Customer Portal. If you are planning on moving the SQL Sentry database, please see the Relocating the SQL Sentry database post.