This is for all versions of the app: standard, SL (for SIM-less devices) and Neo X7 (for Minix TV boxes).
You will need to install the free trial of TeamViewer Go Unattended (any of the above mentioned versions) before running this tool.
After running this tool you'd be able to keep using TeamViewer Go Unattended (any version) indefinitely.
After the license has been activated you can uninstall this tool. Your TVGU app will stay activated.