Hi,
Well, if there is no widgetized area, nor any other way to place the shortcode manually, then probably using a custom code is the only option.
Try adding this custom code to the functions.php in your theme/child theme directory. Before editing, please make sure to have a full site back-up just in case!
add_action('wp_footer', 'asp_add_shortcode_footer');
function asp_add_shortcode_footer() {
// Page IDs where the plugin should be displayed
$show_on_page_ids = array(1, 2, 3, 4);
if ( in_array(get_queried_object_id(), $show_on_page_ids) ) {
echo do_shortcode('[wd_asp id=1]');
}
}
So this code will print the plugin shortcode on pages within the $show_on_page_ids array.