The entry in the [PARTcadAssistant] block contains the path to pcadass.exe.
Should you want to use PARTdataManager as search assistant and not PARTcadAssistant, change the path respectively:
[PARTcadAssistant] EXE=$(CADENAS)/bin/$(OSNAME)/pcadass.exe #ändern auf EXE=$(CADENAS)/bin/$(OSNAME)/ppdatamgr.exe