Lemke Software GmbH, Peine - About GraphicConverter
It's possible this feature was added because I asked for it. It appeared within a few weeks of a request I'd made on the discussion list.
You access the "Crop for Photo Service" from the browser. Browse a folder of pictures, select the ones you want to crop. From the context menu choose "Crop for Photo Service" and watch what happens.
An amazing! time saver.