In certain cases, a Mastermind GT will get into a state that makes it impossible to factory reset it or load new settings from the computer. This is a process you can use to get your GT up and running again.


You will need a FAT (PC) formatted flash drive for this process. The one that was included with the GT will work.

  1. Plug the flash drive into your computer
  2. Remove all files that end in .rjf from your flash drive
  3. Download the MMGTUtil01.rjf file from the link at the bottom of this page
  4. Copy the file to the flash drive
  5. Eject the drive from your computer
  6. Power up your GT while holding the two black buttons under the main screen
  7. Plug the flash drive into the GT
  8. It should load from the flash drive, then go into "Mastermind GT Utility"
  9. It will now erase all of your settings on the GT. This takes about 2 or 3 minutes, and it will put a message on the screen telling you when it's done
  10. When it's done, power down the GT
  11. Plug the flash drive into your computer
  12. Remove all files that end in .rjf from your flash drive
  13. Copy the latest GT firmware file to the flash drive. If the file is a ZIP file, double click to unzip it, then copy the RJF file to the flash drive.
  14. Eject the drive from your computer
  15. Power up your GT while holding the two black buttons under the main screen
  16. Plug the flash drive into the GT
  17. It should load from the flash drive, then perform a factory reset.

At this point, it should be working normally once again. If it isn't, please start a support ticket and we'll help you out.