Link to firmware: http://firmware.mpselectmini.com
Updating the firmware is not supported by Monoprice.
Note: If you have trouble updating, please format microSD card or use another microSD card and try again. Try a microSD card that is 4GB or less formatted with FAT. The printer can be picky at which cards it will update from so try a few cards.
Update not starting? Fan doesn't start spinning?
YouTube link: https://youtu.be/8nELO68ueNY - Updating UI Controller firmware
A simplified version of what is happening at the start of the UI Controller firmware update process.
User needs to be pressing the button to force LCD module into recovery mode.