Thankyou everyone, the .jpg's have been re-instated to their correct place. The world can breath easily again
However, the developer actually DID get back to me, though it took a week and there was a method to repair my fat-fingered IT ignorance, but to be honest it wouldn't have been obvious to me at all had it not been pointed out. I was getting ready to try both Terminal and Automator at the weekend when I had some time to fully explore the methods described. Thanks and obrigado
SHJ