[Ifeffit] system iXAFS3.0.3.dmg, cant open arthena project

Hi, I have a Macbook pro, and I have the  iXAFS3.0.3.dmg system installed. But the artemis program could not open arthena project. when i choose open file and select the file ( arthena project), there system either does not respond or only show the first data in the entire project. How could I fix this?Thanks