Pedal config tool >V2.2 not working (mpc-20)

Hi Doremidi people! Could you help me with this?

Subject: DOREMiDi MPC-20 / Roland RPU-3: Settings not saving and MIDI stream blocked in V4.0.0
Hardware: DOREMiDi MPC-20 (Pedal Converter)
Pedals: Roland RPU-3
Firmware: V2.0.5 (Latest)
Software: Pedal Config Tool V4.0.0

The Issue:

I cannot get my MPC-20 to work with the V4.0.0 software. The hardware is recognized, but it is impossible to actually use or configure the device:

1. Not Saving: Every time I try to save settings (assigning CC 64, 66, 67), the "Set" button triggers a firmware update popup.
2. Even after clicking OK, no data is saved to the device. It keeps showing the last modified values (like CC 21) but never actually updates the hardware.
3. No MIDI Output: There is barely to no live MIDI data coming through in the software. The "Check" button is completely unresponsive and the MIDI monitor stays dead.
4. Contrast with Older Versions: While V4.0.0 is essentially "dead" in terms of communication, older versions (V2.2) work perfectly, showing a fast, fluid, and continuous data stream from the RPU-3 pedals.

The Goal:

I need the MPC-20 to actually save my settings and output MIDI data in V4. How do I fix this communication breakdown so the device becomes functional?

Thank you!