Hello Olga,
I checked my site and found yith wishlist free version installed but not activated under plugins. All my translations were gone and the wishlist was not working when Im logged in or logged out either. All premium features were gone…. All my translations were gone… I had to restore my whole site from a backup. That was not good. Why did you do that?!?
Hope it will be fixed soon… And please test such changes before you change something on a live site :-/…