If there is something that needs your attention it will give you a message baloon at the bottom of the screen:

When you see this message - click on it. It will open a larger dialog where you can update your Oudie to the latest version with a few clicks:

Once the files are on the Oudie you need to reboot it for the update procedure to start on the Oudie. The Updater will ask you to reboot your Oudie:

Other items can be updated too - depending on the version of the Oudie:

When there is nothing to do all items will tell you that they are "Up to date":