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Let me know if that helps.
First I would find out why your Mac shut down all by itself. Although this seems to be a common problem with Mac computers especially the iMac line. There is a long thread on this topic over at the Apple support forums going back to 2012 and still continuing today.
Once you do that I am sorry to say you will need to start over on that image. It seems the edits you had done were wiped out by the sudden shut down.
Mac's, They don't Just Work.
You are wonderful!!! Thank you so much
Thanks I've cleared all info of desktop and that has helped somewhat but it is still doing it, really frustrating.....thanks for your help though.
You are Welcome