Yes, it's possible. You can use either the official Devo version of dfuse, or the deviation USB uploader. Make sure you install the library (not sure it's required for the 7E, but it is for everything else).
The hard part is finding the correct official firmware. Pointers to a couple of places to find it are in the Downloads section:
www.deviationtx.com/downloads-new/catego...tter-stock-firmwares
.