Hello, I previously had some images in the menu, that when you passed over each category changed the image, now I tried to do it in a new tab, but it does not work, what is the reason why it can be? Have you made any changes with this behavior? Previously the images were named Sofás_6539.jpg the following is from the Descanso category, it must be Sofás_6900.jpg or Descanso_6900.jpg, it does not show any of the two, why can it be?
Such menu can be used only for 1 main menu item, in your case, this works for Sofás http://prntscr.com/i8lggp if you want to have the similar effect in another menu item also, some changes need to be made in plugins/et-menu-image/assets/js/scripts.js file.
Please provide us with wp-admin and FTP access in Private Content.