To install a firmware update on the Mastermind PBC, you need a USB flash drive and an update file.
NOTE!!! Please remember to back up your settings before performing a firmware update. If you have to revert back to an earlier firmware version, the Mastermind may factory reset, losing your settings.
Select a flash drive
The flash drive included with your Mastermind will certainly work, and most off-the-shelf flash drives will as well. For best results, stay away from very large drives (greater than 64GB) and USB 3.0 drives. The drive should be formatted as FAT, which is the Windows format. This can be done on any Windows PC and it can also be done on Macs using Disk Utility. As of the 4.0 firmware release, the Mastermind can also format a flash drive. Enter setup by holding the 1 and 3 buttons, then select System Functions, followed by Format Drive. Insert the flash drive when prompted, and it will be formatted for you.
Copy the settings file to the flash drive
Download the latest firmware file from the Mastermind PBC page. If the downloaded file is a ZIP file, double click it to extract it. Now, plug the flash drive into your computer and copy the firmware file, which ends in .rjf, to the drive. If there are any other firmware files on the drive, remove them now to insure that the correct file is loaded. Eject the flash drive: right-click (or Ctrl-click on a Mac) on the flash drive icon on your screen and select Eject.
Perform the update (method #1)
Power up the Mastermind holding the 1 and 3 buttons. The Mastermind Bootloader screen should appear. Plug the flash drive into the Mastermind and the update process should begin. Don't remove the flash drive until the Mastermind finishes updating and returns to the normal operating mode.
Perform the update (method #2)
When the Mastermind is running, hold the 1 and 3 buttons to enter setup. Press the 1 button repeatedly to move the cursor down to the System Functions option. Press 2 to select. Now press the 1 button repeatedly to move the cursor down to the Update Firmware item and press 2 to select.
Insert the flash drive now. A list of your update files should appear. using the 1 and 2 buttons as before, select the desired firmware. The Mastermind will reset and and the update process should begin. Don't remove the flash drive until the Mastermind finishes updating and returns to the normal operating mode.
ON MASTERMIND PBC/10s BUILT AFTER MARCH 2019:
On these units, there's a third option, you can update your firmware using the editor's "Transfer / Firmware Update" menu option:
It should automatically show "Mastermind PBC" in the MIDI Input and MIDI Output sections. If not, make sure that the PBC is connected to the computer using a USB cable, then click Rescan MIDI Ports.
Once the PBC is connected, click the Select... button and select the location of your firmware file.
Once the above is done, click the Start button to begin the update process.