Looks like an abandoned plugin. Don't see any support for new versions of WP. DON'T INSTALL THIS unless you want a headache of fixing stuff it breaks.
After trying it out, then uninstalling it, when trying to edit an existing post it produces:
Fatal error: Cannot redeclare link_categories_meta_box() (previously declared in ..../wp-content/plugins/zelist/includes/admin-submit.php:168) in ..../wp-admin/includes/meta-boxes.php on line 667
WORDPRESS FOLKS: Please please remove this plugin from your directory! Save others the headache!