How to display unlike button

Hi Ali Mirzaei,

Thanks for your nice plugin. I have installed plugin and work well and display like button but not display unlike button.
https://wordpress.org/plugins/wp-ulike/

Right now in single.php file i added shortcode <?php echo do_shortcode(‘[wp_ulike]’); ?>

Please help for how to i see unlike button.