That window should be drawn in a way where it starts at the bottom of the category window. I might've messed something up when I was 'fixing' the window in a previous update though.
Try disabling the category window from the plugin parameters to see if the window magically comes back. I'm not looking at it just this minute, but I recall having to mess with some of the window positioning for various iterations of the Visustella Menu layout, and I may have missed the specific layout you're using. Give that a try and see what happens.
-Ramza