ScooterHacking Utility v2.0.3 is now available.
This release includes an out-of-box activation flow [app will detect non activated scooter and prompt you to activate it], as well as a working downgrade flow for E-series DRV273 and Max DRV170. If you don't want to risk getting stuck on a particular version in the future, get rid of the official app!
Update available immediately for APK users through the self-updater or the official download link, still pending for Play Store users. If you are still using the Play Store version, make the switch now!
Side-note: there are no standalone releases of the newly added downgrade methods, as they won't work with other apps that do not contain a special flashing routine. If you develop a free community app and would like the required implementation, please contact me.