I can’t move up and down the saved CPlanes from the list showed in the picture below. The up and down arrow icons are inactive all the time, no matter what I do. This bug happened right after I accidentally clicked on the “Named CPlanes” tab (the one on the white background below the Save icon) instead on the “World Top”. The arrow icons were active prior that moment, but now they are inactive all the time, no matter which file I open. Drag and drop of the saved CPlanes also does not work. Restarting Rhino and Windows does not fix the issue. Is there any known solution for that?
By the way, the Restore icon is different on the online help here: