Cause: Import from BPMN2 in the Designer does not overwrite the existing process definition.
Consequence: User had to manually remove the old definition before importing the new one.
Fix: Designer was modified so that it now prompts the user if the imported definition should replace the existing definition or not.
Result: This issue has been fixed with the latest release. The user can now choose to either replace the old definition or add the imported definition to the already existing one.