July 18th, 2022
Previously, with DRV versions 1.6.13(1.7.3) and 1.7.0, Ninebot implemented restrictions to prevent downgrading the firmware.
The team at ScooterHacking has quickly responded to these versions with a downgrade but warned that this might not be possible in the future.
With the release of 1.8.3/1.7.13, this version cannot be removed without an STLink.
Let me say that again, you CAN NOT downgrade 1.8.3/1.7.13 without disassembling the scooter and STLinking now.
I have a guide for how to STLink a Max ESC to remove these versions here:
This is the ONLY way to downgrade once updated, it is not likely a fix will ever be developed.
More often than not these updates add nothing to the user experience or cause more problems.