V09
Noted :
1. DO NOT upgrade to V09 if it works well on V05 or V07, CANNOT downgrade to old version or reset to factory settings!
2. Download and install the firmware on Windows，MacOS is not supported.
Update V09 to fix the bug that one of the GameCube controller inputs was being doubled in-game and Not Recognized issues after Switch updated to 19.0.1
How to update W012 GameCube Adapter for Wii U?
Download the firmware from https://www.mayflash.com/Support and install it on your Windows PC.
Push the switch on the side of the adapter to “PC mode” and plug the black USB port to your PC.
select “update Firmware”.
Donot disconnect the device until you are informed that the updated was completed successfully.
