public function deactivate()
    {
        $muPluginFile = WP_CONTENT_DIR . '/mu-plugins/' . $this->plugin . '-mu.php';

        if (is_file($muPluginFile)) {
            unlink($muPluginFile);
        }

        if (is_dir($this->destination)) {
            $this->rrmdir(dirname($this->destination));
        }

        delete_option($this->plugin . 'version');
        delete_option('staticwp_deferred_admin_notices');
    }