To add to the above, while you'll still have to re-pair the devices (the Hub Protection Service will, among other things, apparently take your network "IDs" along so your devices won't care and everything will just work), you won't necessarily have to re-do everything. With the C-5 database restored to the C-7 (or any database restored to any hub), Zigbee devices will be recognized by their "long"/MAC address, so Hubitat will know they're the same devices, and they'll fall right back into place--no need to re-do any apps (except you'll probably want to open any Groups from Groups and Scenes that use Zigbee group messaging and just hit "Done"). This is trickier for Z-Wave because if you pair the device, the hub will consider it a new device, but you can use this trick published by staff to manually swap the old and new devices and thus migrate your Z-Wave network that way:
Given both of these facts, this means you'll only have to re-pair the actual devices and do a tiny swap on the device side for Z-Wave. All a lot easier than totally starting over, though that's still an option if you prefer. 
(And still probably easier than re-pairing all your devices and swapping out the "old" device in any apps that use it with the "new" device, which again should only be necessary for Z-Wave, but that's still an option if you don't want to mess with the trick above. It might actually be the only way if you pair something with S2 or S0 that wasn't paired that way before, but I'm not 100% sure about that.)
