.... As much as I can search, it appears that this is not a "removable edit" ... As far as I can find, the moment I apply it to my photo, it stays with that photo from then on .... surely this is not accurate?? (backing up and starting fresh from that point is not a reasonable option.... too many other factors come into play with offering multiple views and "looks" of the same image...
Just change the PCV Amount slider back to 0 by double-clicking on Amount or the slider thumb, itself.
Thank you! ........ who wuuda thunk! haha