ReSpeaker Mic Array v2.0, can not find DFU Device

Products & Technology ReSpeaker
1

Hi All,
After flashing with:

sudo python dfu.py --download MicArrayV3_firmware/6_channels_dfu_4.0.0_firmware.bin

my device no longer enumerates in DFU mode. How can I recover/force it back into DFU? I’m considering reflashing with:

sudo python dfu.py --download 6_channels_firmware.bin

Is this the correct firmware and procedure to restore DFU detection?

Thanks