The front page of your admin panel notifies you of new WSN releases, and also lets you select whether or not you want to let it automatically update itself to the latest stable or unstable release. In most cases, you'll want to leave it set to the default of upgrading to the latest stable release automatically. If you wish to be conservative you can select to apply only critical security updates automatically, and if your web server has trouble with automated updates you can turn them off. If you're still in development mode you may wish to use the unstable updates, which are beta versions between each release.

If your web server has had problems with automated updates for some reason, or you have a careful testing process before applying each release, then you may want to disable the automated updates by selecting to update to "no" new releases. In the event that your web server doesn't support automated updates or you've disabled them, you can still click the update button prompt to get the update.

Automated updates only apply within the same series. In order to jump to a new series, you'll need to press the update button -- and you should probably make a backup first and be prepared to spend a few minutes ensuring everything worked right after a series jump.

If you're having a problem with automated updates, see automated updates troubleshooting