Flew fine earlier today, and on return I saw there was a firmware update so did that through the app. Installed successfully, now my galaxy s7 wont connect to the controller. Tried changing cable, reinstalling Fly app, phone restart. Nothing works. Previously when connecting the cable to the phone the Fly app would automatically start up, now it doesn't. Must be a firmware issue as it worked fine earlier today! Is there a way to roll back the firmware? Is there a guide how to do that on here somewhere? TIA