In 10.9 Mavericks the default for the Finder is to now open the selected folder in the same window instead of a new tab or window. How do I go back to the old behavior where a new window (or tab) is opened for each folder?
The closest solution is to go to Finder Preferences > General, uncheck the "Open folders in tabs instead of new windows" option, and then use Cmd + double click to open in a new window.
Close sidebar, right click tool bar in window and "hide". Now you can double-click to open.
Turn on right button clicking for the mouse in System Preferences. Then right click for sub menu and "open in new window"