The plugin is installed and activated, but I've got no idea how to operate it. I understand that there is nothing particular to do, but actually, there is no difference with when I hadn't installed this plugin. My galleries still look like the default setting from WordPress. I also understand that it is supposed to work best with a specific theme from the same author. Well, maybe it only works with it, but I'm not going to adopt it for this reason. And since there are no explanations whatsoever, I'm just going to give it up.