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DUMLdore
DUMLdore is a Windows app that can transfer firmware to/from a DJI product. Go to the GIT repository below to download and read detailed instructions
Compatible with
Aircraft:
Remote Control
Goggles
Using DUMLdore
DOWNLOAD THE ENTIRE ZIP FILE NOT JUST THE EXE
Make sure you have at least 50% battery remaining before you begin
Make sure Assistant2 is not running
Turn on your device (Aircraft / RC / Goggles) and allow it to fully start up before connecting to PC. (Wait about 30-60 seconds)
Plug in USB cable from the aircraft/RC to the PC. Make sure you are using a good DATA cable, NOT a phone charging cable.
Start DUMLdore.exe
Confirm connectivity
If DUMLdore does NOT detect your device, close DUMLdore, run Assistant and let Assistant detect the device.
If Assistant DOES NOT detect your device, DUMLdore will not work.
Once Assistant detects your device, CLOSE assistant before running DUMLdore
Use DUMLdore
FLASH: Upload the firmware file to the device and begin the upgrade/downgrade.
BACKUP: Will make a flashable firmware backup of the currently connected device if applicable. It will save the dji_system.bin file into the current directory. It may take some time. Please be patient as the status may take a few moments to update on some of the files. If you are making a backup of your aircraft and your remote controller, rename or move the 1st backup file into a folder before running the backup on the next device.
Firmware
You can see available firmware here or directly from GIThub
Credits
Thanks to hostile, the_lord, p0v and many others for the information :)
-jezzab (copied from his Git, with additions)