Organizer

[Mary5E64]

Thumbnails in grid will not open for editing in Organizer.  These are pictures that would previously open, but after my most recent import don't open  anymore.  Any suggestions?

[MichelBParis]

First thing to try:

Optimize the catalog

That takes some time, be patient.

If that does not work, simply delete the thumbnail cache and it rebuild itself. That may take several hours in a background task. Better do it as a night job.

First locate your catalog folder. Menu Help >> System Information of the organizer. Delete the thumb.5.cache file.