NetHunter 2.0 over NetHunter 1.1 on Nexus 7

Hi.
I've been running NetHunter 1.1 on Nexus 7 (2013) WiFi for a couple of months.
I wondered if it's possible to download NetHunter 2.0 ZIP image and install it over my old installation in recovery mode.
I tried and remembered to wipe Dalvik + Cache, but it stuck in the four circles.

I tried to wipe System + Data + Dalvik + Cache and reinstall NetHunter ZIP image, and it hanged on Google + unlocked locker.

Any hints? Thanks!

Flashed stock Lollipop image and then reinstalled everything. Now I have Kali Nethunter 2.0 running :)
Thanks!

Yeah for anyone reading this, unfortunately you have to go to stock image and start from scratch to install 2.0.