To update the software, you don't need to uninstall and reinstall the new version. Just download the desired version and install it. Please follow the installation instructions for more information.
Note: Make sure your subscription is active in order to be able to download the latest versions of the product.
Automatic update notification
Notifications about automatic updates are enabled by default. You can change the behavior of update notifications in Visual Studio
Tools | Options menu. In the dialog, navigate to
Environment | Extensions and Updates and tick or untick the Automatically check for updates option (see picture below).