Website is down. Unless you have better knowledge I can tell you it is not true. In short:
1. If you have Windows 10 Home are out of luck. There is no way. As the name suggest, keep your Windows home with closed windows (meaning no Internet access). This is the only way to disable Windows Automatic Updates on this version.
2. In Windows 10 Pro version you can disable automatic updates in group policy editor. However it applies only to the Windows itself, not a Windows integrated components like Defender, Edge and other apps. The Apps appettite can be reduced on the metered connections, which can apply to WiFi and is default on RAS connection type (like older 3G modems). A new 3G/4G high speed devices use LAN interface. There are no restrictions on the LAN RJ45 port connection. And you must remember that metered connection options are ambiguous terms. By example default option on a metered connection is defined as "metered after a cap limit". Microsoft do not specify what is a cap limit. Various sources reveal that "cap limit" is a flexible term "If we decide we want to push our updates, we will do it". In other words, user has no control over updates. Even if you finally manage to bypass all tricks and lies, you will get denial of service UAC after 2 weeks of not accessing Internet. See here:
http://mybroadband.co.za/vb/showthread.php/779629-Windows-10-still-feels-like-a-Beta/page4
EDIT: The Webpage is wrong: option '5 'do not allow to disable automatic downloads. Option '2' is correct one.
Another error: "Select Download" tool do not prevent downloading updates. It only blocks particular update from installing again in the future.