Updating Zen Studio is very simple, you only need to be connected to the internet.
If there is an important update detected which fixes a critical bug, you'll see this warning. Simply click OK and it will auto direct you to the Software Update interface.
Simply select Tools 👉 Zen Studio Update from the drop down menu and you will see a 'Software Update' notice telling you that there is either a new version or you have the latest version already installed.
If there is a newer version is available, review the notes and click on NEXT to update.