Cyanogenmod updates from 10.2 installer to 11 M1

[Anttl462]

Hello, I have had cyanogenmod 10.2 from the installer for a while, and I wanna upgrade it to the 11 milestone 1. I manually installed CM on my phone (LG Optimus G) so I have some experience with flashing, but how can I get CM 11 on my N7 without losing data? There is no option for "Cyanogenmod updates" on the installer version.

 

[dribnus]

Did you ever figure this out? I'm having the same question/issue.