protected function is_updated() {

		if ( $this->is_active() && isset( $this->plugin[ $this->slug ]['last-update'] ) ) {

			$interval    = Plugin::WP_Plugin_Info()->getOption( 'interval' );
			$last_update = $this->plugin[ $this->slug ]['last-update'];

			if ( ( time() - $last_update ) < $interval ) {
				return true;
			}
		}

		return false;
	}