Double-click on the Performance! icon located on the MS Windows desktop:

Alternatively, click Start > All Programs > Performance Application > Performance from the taskbar to start the Performance! application, see figure below.

Select the correct Data Source Name (link to the Database):

On Stand-Alone Version it's : Perform_Local_XX.

Where XX is the performance version

On Client version it depends on the ODBC Setting, but it's usually Perform_Net or Perform_Network or XXX_performance.

Where XXX is the Flowserve site code

FAQ :

Cannot Open Performance!