I've had a similar problem. The only solution I've come up with is to add the other views in by going to 'view' and clicking on the view I want to show up. Close the windows you don't want, like the messages window you may not need, add all four views back in and tile them. (I believe under the 'window' menu - can't run steam at work)
I would also love to know how to get the original 4-view back so they're all connected. Anyone?