Thanks for the reply. OK, I understand what’s going on a bit more, so no worries.
I think I’ve sorted the second issue, I also started seeing all sorts of weird things happening, such as multiple ‘Revert’ boxes not related to the image I was working on. So I ran the Reindex option, and that seems to be resolved now, as is the crash when editing.
As far as the batch process crash, would it help to run it on smaller sets of images, My albums vary from a handful to many hundreds. Would working on, say, a max of 100 at a time be better?
Cheers, and thank you for an otherwise great photo editor (I also have the Mac version).