If there is no virtual system, you must first make a virtual system (select Format emuNAND in GW menu), otherwise the original system will be upgraded.

Method for judging whether there is a virtual system (important):

Enter GW mode, and then enter the system settings to see if there is GW3D written in front of the system version number. If there is a virtual system, please restart the machine and continue to look down. If there is no GW3D and no virtual system, please go back to the first step.

When entering GW mode, press and hold the DPAD key.

Select the high version game rom in the same area in GW mode.

Run the rom and follow the prompts to upgrade.