Recently I've found that I can't change the camera on various entries. The entries are in the box labeled fields of view. It includes various combinations of telescopes, eyepieces, Barlows and cameras to allow seeing a visual of the selected field of view on the map.
The issue I've found is that I would select one of my entries to edit, say 140 f/7 telescope, rebel t3i camera and qtcc and I'd change the camera to another, say 6D or ATIK, and the press ok, and get various behaviors, none of which is correct. The window comes up with nothing listed in the camera line (zippo) but it does show a camera and window on the screen. Sometimes it comes up with a different camera than the one selected, sometimes it comes up with an eyepiece instead of a camera. So this used to work perfectly, but something has changed to cause corruption. I've tried various combinations but find no pattern, other than if I pick an eyepiece instead of a camera, the eyepiece seems to enter correctly, but selecting a camera can result in another camera, and 'none' listed in the entry.