I don't expect there currently exists any way to change this inside of the application, but I know that, personally, it's distracting to see things like the free foreign-language translations and selected sermons from particular ministers available generally in Logos 4 iPhone when I have an actual library of books that I'd like to get at. It's obviously not a huge deal, but I can't imagine that developing a fix would be terribly hard either—some sort of off-on switch for free content seems sensible. it just doesn't make sense that you can remove every book you'd like from showing up in the desktop application, but you're forced to see particular books show up.