Problem solved.
Photos filenames looks like that Niara_thickbox_default, changed to thickbox_default and everything works like before switching.
Don't know why thirtybees changed the filenames when switching from theme to theme.
Hi everyone
I need quick help. When i have changed theme from Niara to Community Theme Modded and back to Niara i've lost allmost all photos from home page and from featured and best selling products. Thumbnails regeneration didn't work.
Any ideas whats wrong?