Looks ok to me, except for the space in IN GROUP, should be INGROUP.

 Code:
IF INGROUP("temp app")
   IF CompareFileTimes("\\powervault\OEM Office\Quality Documents\ISO\Database Master Files\OEM\OEM_version.txt", "C:\DFP\OOO\OEM_version.txt") = 1
      COPY "\\powervault\OEM Office\Quality Documents\ISO\Database Master Files\OEM\*.*" "C:\DFP\OOO\*.*"
   ENDIF
ENDIF