I have recently looked at a very large number of photos which were edited to perfection more than two years ago. Most of these photos have required re-editing (primarily exposure, which had change dramatically to much darker). The original edits still showed but the photos were not at all what they were left at after editing two years ago. Photos taken since and before remain unchanged. Just this very large group of photos from a trip needed re-editing.
Has anyone ever experienced this? I'm told that this is not possible but have spent a considerable amount of time correcting it. I am still using the same computer and monitor and all were created under Elements 11.