The uml2 profiles are developed with the IBM Rational Software Modeler (RSM). To provide versions usable for other UML2 based tools like Topcased or Papyrus, the epx profiles have to be exported to standard uml profiles.
Select Export... on the context menu of the exp profile file. Choose UML 2.1 Model export.
Select the folder profiles/uml2 as destination and deselect Recreate IDs and Export applied profiles.