[Ifeffit] Renaming groups in Athena

Hello, I am writing to report what I believe to be a bug in Athena. In the attached project, there are two groups, a main group and a reference group. Changing the name of the first group does not change the name of the reference group. Changing the name of the reference group separately doesn't work well either. This results in an extra "Ref" being added to the beginning of the group name, which cannot be deleted. This happens every time one changes the name of the reference group, which can result in quite a long name for the reference. Let me know if any further information would be helpful. Thank you, George