Pro version uses mysql_query function

I inherited a site using the PRO version of this plugin, and found it would work on one server but not on another. Further investigation revealed that the plugin uses the PHP mysql_query function instead of using methods of the WPDB class, specifically in the lsp_database.php plugin file.

WordPress plugins should always use the WPDB class for all database access and to use an obsolete PHP function in this way, when the mysql extension is no longer installed on all servers, is inexcusable.