Guys had everything dead like many of you. Found the fix.
The problem: use both microbruteconnection AND/OR midi control center.
With the latest firmaware, tried to update using microbruteconnection = didn't work, then tried to use midi control center = worked.
BUT: sequencer dead
So forget about microbruteconnection = shitty program not supporting the latest firmware well
Only use midi control center: then update back to MicroBrute_Firmware_Release_V1.0.3.2, then upgrade again to MicroBrute_Firmware_Update_1_0_4_114.
Then tada it works.
It's really lame Arturia seriously. Lost 1h of my life for nothing but bad software design.