My RC was on Firmware 1.9.2 and I can't seem to get it to RC 1.8.
Using the DJI Go App method (on iOS), I held the 3 lines in the upper right to get to the rollback menu, where I had 3 choices for Firmware: 1.58, 1.6, and 1.8.
Choosing 1.8 and hitting download: Download failed (no matter how...