WEBSep 10, 2024 · Below are the steps on how to install or upgrade Razer Synapse. Select Razer Synapse version. Razer Synapse 4. Valid e-mail, software download, license acceptance, and an internet connection to activate full features and software updates. Installing the new applications will uninstall Razer Synapse 3. Razer Synapse 4 is …