Check the WordPress Plugin listing on the Plugins List on your WordPress site, or on the WordPress Plugins Directory to determine compatibility and if updates are available.
If a WordPress Plugin update is available, it will be shown on the Dashboard Panel, an alert on the Plugin's menu title, and on the Plugin List. Follow the instructions to update the Plugin.
If a WordPress Plugin is not compatible or updated for the next release of WordPress, contact the Plugin author directly for information on the next update and compatibility issues.