In Windows 8, whenever you launch a second instance (new window) of an already running desktop app, the Start screen does not launch a new instance of that app. It merely switches to the already running desktop app's window. This can be highly annoying.
To open another window of the same program, you have to either Shift+click on the Desktop app's tile or right click and choose "Open new window". The behavior in earlier Windows versions which had the Start Menu was different. The Start menu always always launched a new instance of an app.
Luckily, there exists a way to allow us to control this behavior. Let's see how.