I found it quite tricky to do the power off with the black screen. I didn't get the coloured lights with my Aura E2 while restoring, just a pause with no light, a flash, and then the restoring screen with the solid blue light. It's not downloading the correct update yet for me because I'm back to a black screen after seeing a factory reset start and attempting to update via wifi.
Edit: Note thatI have an Aura 2, not Aura One. Wrong thread (apologies) but the reset instructions allowed me to roll back to the last version (the one with the new home screen), so thanks.