@turtlenate Good idea, that would have been my next suggestion. I've done it before and when you untick 'wipe user data' it's quite safe. Best of luck!
@adlinux This is not anything I can help with unfortunatly. You really need someone with your phone to confirm the issues and any fixes. Lets hope you get that answer soon.
I changed mine from recovery just with :sudo ubuntu-device-flash --server=http://system-image.ubports.com --device=turbo --channel=15.04/devel
Meizu Pro 5
all data and settings intact 🙂