how to still limit post via Query

First the Plugin works fine, just one thing.
On one page i would like to limit a taxonomy post to 10 instead of the amount i set in the plugin. So i used:

<?php
$args = array(
    'post_type' => APP_POST_TYPE,
    'meta_key' => 'clpr_featured',
    'meta_value' => 1,
    'posts_per_page' => 10
);
query_posts ($args);
?>

.

Unfortunatly its only working if i switch of the plugin 🙁

http://wordpress.org/plugins/simple-custom-posts-per-page/