Hi @narururu
I hope you are doing well.
You are correct, this requires a connection to our HUB so the API can allow the new engine to scan the website, but there are two connection methods, if you are not comfortable with the auto connection you can use the Dashboard method which uses the account created in WPMU DEV instead: https://wpmudev.com/docs/getting-started/installing-the-wpmu-dev-dashboard-plugin/
I hope this can allow you to connect and convert into a 5-starts experience.
In case you would like to not connect at all, the plugin is also going to allow you to use the V1 engine.
Best Regards
Patrick Freitas