For some reason, after installing it (on win7), when I load it, I don’t get any root window.
It seems that I only get the renderers.
I tried both the latest version and the last one I used (v4beta16) and got a similar behavior.
At first I thought the root window would be outside the screen but I connected my external display and it’s also not there.
Apparently I’m not the first one with this problem as I found in this old thread: