helpful_admin_columns_post_types
Help: If you do not know how to execute or save your own PHP code, you can find help here: How to execute PHP code on your WordPress website
Allows to filter the admin columns afterwards, so that columns can be shown in the admin area even if a desired post type is not selected in Helpful settings.
Example for your functions.php:
add_filter( 'helpful_admin_columns_post_types', function ( $post_types ) {
$post_types[] = 'my_post_type';
return $post_types;
});