I've updated my Inspire 1 with X5R yesterday.
It's an early Inspire 1 that is converted to carry the X5R.
I went to the dji download page, selected Inspire 1 and downloaded the latest firmware.
Tried to install it with the X5R mounted.
That didn't work. Then I checked back the downloads page and saw that X3 was mentioned with the firmware.
So I mounted my X3 to the Inspire and the firmware was installing.
When the install was complete I've downloaded the firmware of the X5R...
X5R motors dead after firmware update