Usage:
- CURRENT.UF2 should be in the same directory
- Drag payload file onto the file "DRAG PAYLOAD HERE.bat"
- CURRENT.UF2 will be automatically patched with the payload file

Command-line usage:
- Windows
  generatefw.exe <CURRENT.UF2_file> <payload_file>

- Linux/OSX (after compiling from source)
  ./generatefw <CURRENT.UF2_file> <payload_file>