Libraries is no longer a dedicated tree view tab
This data is available in the Developer or the Browser tabs
Tree selection is no longer linked between Scenes and Developer tree
Prior to Visionary Render 2.0, any selections made in the Scenes tree view were replicated in the Developer tree view so it was possible to switch between these tabs and see the same selection.
With the removal of the Libraries tree, these views no longer share their selection. There are context menus in each view to "Select → In <other view>"