We have just recently released an update for the full version, UltimateWB 7.71. This includes an upgrade to the Ad(d)s feature for the Members App.
We got a feature request to be able to add/edit php coding to be run after a user logs in or registers a new account, similar to the setup we have for the Facebook, Google, and Apple social logins. So, now you can easily do it with this update!
We welcome your feedback and hope you enjoy!