Exclude Additional Post Types from the Arconix Flexslider widget select box

gistfile1.php

<?php
// In your theme's functions.php file

// To add 1 post type to the exclude list
add_filter( 'arconix_flexslider_exclude_post_types', 'exclude_pt' );
 
function exclude_pt( $post_types ) {
    $post_types[] = 'post_type_name';
 
    return $post_types;
}

gistfile2.php

<?php
// In your theme's functions.php file

// To add multiple post types to the exclude list
add_filter( 'arconix_flexslider_exclude_post_types', 'exclude_pt' );
 
function exclude_pt( $post_types ) {
    // add your post type names here
    $types = array( 'post_type_name_1', 'post_type_name_2', 'post_type_name_3' );
    
    foreach $types as $type {
        $post_types[] = $type;
    }
 
    return $post_types;
}