Robin, thanks for the quick reply.
Exception, here under W7: I attach some files including a FITS (without annotations) that is saved despite of SC crash, also some logs. As I wrote, it occurs when I press the button "Save Image with Annotations", under W7-64 and also under W10-64 21H2.
OccultWatcher integration
Yes.An 'add target from clipboard' button will be what is needed for OccultWatcher integration then I think.
Cheers, Christian