XnView Software

Hello,
i set some categories in my collection of people, then i changed all PSD images to PNG or TIF format.
Anyway, When i call the Category, these images are still shown as PSD and XNview becomes extremely slow so that it's impossible to browse results.
Probably Database cannot see the change of the format of an image.
I attach a screenshot where you see some PSD images listed, which are PNG or TIF instead.

Thanks,

If you change save the image in another format, categories are only kept if you are using metadata. Your PSD files exist?