I know you said you followed the directions as linked, but I would verify that the service has actually been stopped while you are editing the config file and then restart afterwards. You might also need to crtl+F5 to refresh the page so the browser ignores its cache.
If you have used a Notepad++ as suggested, then you need to explicitly save changes in the config file by menu File - Save, it should ask for Administrator’s rights, you need to confirm and save again.
After that you need to restart the service either from the Services applet or from the elevated PowerShell