For DVBViewer Pro 5.6.1, from either the menu bar -> Favorites menu or from the right-click -> Favorites menu, selecting any of the channels results in absolutely nothing. From the Channel Edit menu -> Favorites menu, however, selecting any of the channels results in DVBViewer tuning the selected channel. Even when the Favorites.xml file is deleted and DVBViewer creates a new one, DVBViewer still does nothing when a channel is selected from a "created from scratch" Favorites menu. (The Favorites menu of course works correctly under DVBViewer Pro 5.5.2.)