If no application has been started yet, the ENTERPRISE 3Dfindit client starts, if this is not possible, PARTdataManager starts; if an application is already running, the user is asked whether he wants to start 3Dfindit or PARTdataManager.
Also see Section 2.6.2, “ Insert from the standard and purchased parts library via "PARTdataManager"” bzw. Section 2.6.3, “ Insert from the standard and purchased parts library via "ENTERPRISE 3Dfindit" ”.