Sometime since version 11 or 12, I had this problem of unable to delete or rename saved zoom in Zoom Options (refer attachment). This's one area I used often as it enhanced productivity. However, this problem does not happen to some saved zooms though which makes it even more puzzling. These outdated zooms cluttered the drop down list. I think I've had enough of this hindrance and wish there's someone can help. Thank you.
Presently running Archicad 16, MacBook Pro Retina.