Do I need to uninstall the old version before I install the latest version?

If the update is minor update, like v2.1 update to v2.3, you don’t need to uninstall the old version, just cover the old one If it is the major update, like v2.1 update to v3.1, we strongly recommend you to uninstall the old version first, then install the latest version, to make sure some new features can work well.