I just found the new Firmeware on your Website 0.90 and I downloaded it.
So the problem ist, that the ArduinoBaord Uno can't write this programcode on the Board.
The 0.81 Firmware have 26398 bytes (from 32256byte)
0.90 firmware goes up to 29916 bytes. I think the bootloader on the board needs more space, so the programcode is to big for the arduino.
Or where ist the fault?