It appears that the <love> icon in the Now Playing pop up is currently not programmed to do anything when clicked on.
Not sure if it's intended or an oversight - Steven might have to take a look.
@herchi
For now, you will have to [shift] + click on the love icon in all other MB locations except the Now Playing pop up.
From your screenshot in the linked thread above, you do not seem to have the <love> icon enabled in the player panel.
You don't need to tweak any skin to get the <ban> icon to show (there's already a default icon assigned to it).
All you have to do is right-click on the player panel > enable the love icon > then shift+click to ban the playing track.