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I used Photo Rec to recover .jpg files that had been encrypted; it worked, somewhat. Recovered some pics, but many pics were in thumbnail form. Also it recovered some pics multiple times and did not recover others at all.
After reading more about Photo Rec I realized I used the same partition. Would Photo Rec still recover the .jpg files if I ran it again, saving the recovered files to another partition on the hard drive on my lap top? If not, I still have encrypted .jpg files on my back-up; so If I reloaded these files to my lap top hard drive, would it work if I ran Photo Rec? Please advise.

Unfortunately if data have been written to the source partition, deleted data may have been overwritten. It's not possible to reverse this operation.