I followed the instructions for upgrading the firmware to version Mk4. Now the motors do not move. If I press the switch I get no pulses that I can feel like I did before the upgrade. I tried applying the firmware twice and both times it was successful per the instructions. I would like to downgrade to the Mk3 to see if it fixes it but I cannot locate the files unless it is the Mk2 version. Please advise.
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I have the same problem using an UNO board