Fatal Error- Can't Upload Pro Version of Smush

I can't upload my purchased version of WP Smush Pro - I get this error. Can you help?

Fatal error: Cannot redeclare wp_smush_rating_message() (previously declared in /nas/content/live/pridezillas/wp-content/plugins/wp-smushit/wp-smush.php:73) in /nas/content/live/pridezillas/wp-content/plugins/wp-smush-pro/wp-smush.php on line 88