There's really no difference between the new version of this add-on and the old version, except that you have to apply for a MaxMind account of your own, get the API key, and enter it into the add-on. The add-on does the rest, just like the old one did, once this step is completed. It's a "do once and forget" type of thing.
Getting an API key is a minor and simple thing to do, and is completed within just a couple of minutes.