Mr Grump

I am quite a noob at AP so I am quite proud that I think I can recover my cropped picture. Although Darken/Reveal does not appear in the context menu I decided to fiddle around (I think it's call investigative exploration). After cropping and saving a photo I dragged the edges of the image out producing a blank grey edge extending from it. I selected apply and lo and behold the original image was re-cropped to a new image. Hope this helps.