Ubermenu or Megamenu for this objective?

and an important link : http://sevenspark.com/docs/ubermenu-enfold for UberMenu 2

http://sevenspark.com/docs/ubermenu-3/theme-integration/enfold for UberMenu 3

First of all there is a little mistake in that tutorial:

The code to substitute is this (without that last curly bracket !) because Enfold does not have here a curly bracket there !

$output .= "<nav class='main_menu' data-selectname='".__('Select a page','avia_framework')."' ".avia_markup_helper(array('context' => 'nav', 'echo' => false)).">";
        $avia_theme_location = 'avia';
        $avia_menu_class = $avia_theme_location . '-menu';
        $args = array(
            'theme_location'    => $avia_theme_location,
            'menu_id'           => $avia_menu_class,
            'menu_class'        => 'menu av-main-nav',
            'container_class'   => $avia_menu_class.' av-main-nav-wrap'.$icon_beside,
            'fallback_cb'       => 'avia_fallback_menu',
            'echo'              =>   false,
            'walker'            => new avia_responsive_mega_menu()
        );
 
        $main_nav = wp_nav_menu($args);
        $output .= $main_nav;
         
       
    /*
    * Hook that can be used for plugins and theme extensions
    */
    ob_start();
    do_action('ava_inside_main_menu'); // todo: replace action with filter, might break user customizations
    $output .= ob_get_clean();
     
    if($icon_beside)
    {
        $output .= $icons;
    }
         
    $output .= '</nav>';
 
    /*
    * Hook that can be used for plugins and theme extensions
    */
    ob_start();
    do_action('ava_after_main_menu'); // todo: replace action with filter, might break user customizations
    $output .= ob_get_clean();

but the code you have to insert is ( with that last curly bracket !)
logic misleaded me first because i thought i had to make it from semicolon to semicolon

if( function_exists( 'ubermenu' ) ){
    $output.= ubermenu( 'main' , array( 'theme_location' => 'avia' , 'echo' => false ) );
}
else{
    $output .= "<nav class='main_menu' data-selectname='".__('Select a page','avia_framework')."' ".avia_markup_helper(array('context' => 'nav', 'echo' => false)).">";
        $avia_theme_location = 'avia';
        $avia_menu_class = $avia_theme_location . '-menu';
        $args = array(
            'theme_location'    => $avia_theme_location,
            'menu_id'           => $avia_menu_class,
            'menu_class'        => 'menu av-main-nav',
            'container_class'   => $avia_menu_class.' av-main-nav-wrap'.$icon_beside,
            'fallback_cb'       => 'avia_fallback_menu',
            'echo'              =>   false,
            'walker'            => new avia_responsive_mega_menu()
        );
 
        $main_nav = wp_nav_menu($args);
        $output .= $main_nav;
         
       
    /*
    * Hook that can be used for plugins and theme extensions
    */
    ob_start();
    do_action('ava_inside_main_menu'); // todo: replace action with filter, might break user customizations
    $output .= ob_get_clean();
     
    if($icon_beside)
    {
        $output .= $icons;
    }
         
    $output .= '</nav>';
 
    /*
    * Hook that can be used for plugins and theme extensions
    */
    ob_start();
    do_action('ava_after_main_menu'); // todo: replace action with filter, might break user customizations
    $output .= ob_get_clean();
}

this last curly bracket closes the else clause.

i wrote to chris because (see code text above) on his turorial for integrating ubermenu3 to enfold he made that little mistake.

If you look now to that tutorial he has removed that little curly bracket which causes some misleading interpretation on what to replace in original code.