We've had a feature request submitted that allows you to change the ordering of rules. With such a feature you should be allowed to drag your exe file into another fence, but at the moment, you unfortunately cannot.
The enhancement software is available under "My Software", whereas games are available under "My Games." Is there anything in particular you're not seeing?
To see Fences Pro, you will need to enable "Show Pre-release versions" from the blue menu in the top left of Impulse.
Mike