I have lost a batch of photos so have been hunting. I have LR6 but opened LR4.4 to see if by chance they were there. It immediately asked me to optimize my catalogue for LR6 which I then did. All my recent work that has been downloaded and processed in LR6 has gone from LR6 and can only be found in LR4.4. Obviously I have made a mistake in authorising LR4.4 to do it's optimisation, but I need to undo that process so my photos are available in LR6. What should I be doing? To make matters even more frustrating I didn't find the lost batch of photos!