The Hardware: The DM-1702, a programming cable (the FTDI chip variant—avoid the counterfeit Prolific chips like the plague), and a Windows 10/11 machine.
The Software:
Once the software displays "Success" or "Update Complete," the radio may reboot automatically. If it doesn't, turn it off and unplug the cable.
1. Fixing the "DMR Audio Lag" and "Motorboat" Sound