Have you left your Wii U off, and now cannot upgrade to 5.5.1 because 5.5.2 is out? If so, this is for you!
Updating to 5.5.1 from lower versions
WARNING: You could potentially brick if your Wii U powers off before all update titles are completely installed; I am not responsible if this occurs!
Do not use a NUS Title List that is not from your region!
Please note this copy of WUPInstaller has no security checks; if you install the wrong title...
Do not use a NUS Title List that is not from your region!
Please note this copy of WUPInstaller has no security checks; if you install the wrong title...
Updating to 5.5.1 from lower versions