Since AppStrap 2.4 drop down menus show on hover. When adding new drop down menus simply add data-toggle="dropdown" data-hover="dropdown" to the trigger link make them show on hover instead of click. For submenus you should include data-close-others="false" so the parent menu is not closed when hovering a submenu.

To revert to using “click” drop down simple remove the usage of data-hover="dropdown" on drop down trigger links.

See https://github.com/CWSpear/bootstrap-hover-dropdown for more info.