So glad this plugin was made, definitely should be included by default in core.
English translation was a bit hard to understand in a few places. I was confused by "Possible nomination for ID or class" in the options. This actually just means the name of the element you want to hide. So if you want to hide an element that isn't included with this plugin you can specify it by putting a descriptive name on the left text box and the actual CSS ID or class on the right box like: