I also recently acquired a GB pro. I keep trying to update the code but it fails. I have a number of spike 2 games that I updated with thumb drives prior to IC being released so I get how to do it.
When the GB fails, all the factory default settings are back in place. I have tried multiple USB sticks. Anyone have any ideas? Thanks in advance. The game rocks but I am dying to play it with version 1.17.0