It would seem that there is a simpler way to bring the Incognito window into play. Right click the Chrome icon in the Taskbar. The popup box shows an option to open in Incognito mode. It's already there for you to use.
By the way, the changed icon shown in the How-To Geek article is the official Chrome Canary icon (it's three shades of yellow). Yes, you probably knew this, but we're just pointing it out to avoid any confusion which may arise with some readers.