Log in to the ProtonVPN Windows application and click the drop-down menu icon in the top-left corner "About". In the "About" window, you can see the current version number. There are enhancements, bug fixes, and new features added with every new ProtonVPN app release, all of which enhance user experience. Usually, the most recent version of your ProtonVPN apps should always be used. In order for our support team to better help you solve any issues, please let us know the version of the ProtonVPN app you are using.