MIG Switch Dumper Firmware Upgrade

If you are following the instruction on GBATEMP.NET, they will read as follows:

INSTALLING/UPDATING DUMPER FIRMWARE​

• Unplug the Mig Dumper to let the update take effect
• Plug in the Mig Dumper via USB
• Mass storage device will appear, with a folder 'System'
• Drag & drop the (downloaded) update.s2 file to the Mig Dumper 'System' folder, to overwrite the update.s2 file present there
• Wait for copying to finish

This is a reminder you actually have to OVERWRITE the update.s2 file. If you try to cut and paste the old version somewhere else and then copy the file, it won't work