Use this menu type only for a secondary menu, not for the main navigation of the template, reserved for the nav module position. To use the horizontal menu styles, simply insert the favth-horizontal Menu Class Suffix inside the Advanced Options of the menu module:

For a horizontal menu that is aligned to the right, add favth-pull-right after favth-horizontal:

favth-pull-right to work, you need to insert a space before it (by pressing the spacebar key from your keyboard).