To update Gameduino firmware:
- update to the latest GD library from http://excamera.com/files/Gameduino_m.zip
- remove all other shields
- load and run sketch Examples -> Gameduino -> 6.Manufacture -> load0
- same with load1, load2, load3. As each completes it should report "OK" as in the screenshot above.
- if all the above sketches were OK, run load4.
load4 is the critical one: it checksums all the data, updates the boot flash, then reboots the Gameduino. After it finishes, you will see the Gameduino boot screen.
This process overwrites the Gameduino asset library. To restore it, run sketches asset0, asset1, asset2.