When connecting to a Performance Analysis for SQL Server (PASS) installation where the SQL Server instance has been upgraded SQL Server 2008 build 2714 the PASS GUI is showing "Unknown Version".
If the PASS processes are where still running at the time of the upgrade, then they have not had a chance to check the SQL Server instance for the fact that the version has changed.
Please restart the QAM Launcher 3566 service on the middleware machine and then on the monitored host where the SQL Server 2008 build 2714 instance resides. Doing the restart of the QAM Launcher 3566 service should restart the PASS processes such that they then recognize that the SQL Server instance has been upgraded.
If you are still seeing "Unknown Version" after restarting the QAM Launcher 3566 services, then please raise a case to Quest Support.