Thread tracking on corkboard

I’ve been trying to establish thread tracking on the corkboard (I think it is also known as arrange by labels). I’ve set up labels and assigned them to text files and folders (scenes and chapters), but I don’t see any functionality to enable the thread lines. I have the latest version of Scrivener installed. Having said that, I’m using Windows, not Mac, though I can’t find any mention of this function being Mac specific.
I suppose my main question is can it be done in Windows OS. (I’m using Windows 7).

If you’re using the release version 1.9.x, that doesn’t have it—it was brought in with Mac v. 3. If you’re use the Windows v. 3 Beta, I don’t know if it has been fully implemented yet.