OH2 stop working after update from 2.0.0-rc1 to 2.0.0-1

Hi. I had a workig setup OH2 beta. The I change the the repo from testing to stable:
deb http://dl.bintray.com/openhab/apt-repo2 stable main
aufther that I did
sudo apt-get update
sudo apt-get upgrade
after the restart HO not working anymore. systemctl status is saying:
● openhab2.service - openHAB 2 - empowering the smart home
Loaded: loaded (/usr/lib/systemd/system/openhab2.service; enabled; vendor preset: enabled)
Active: deactivating (stop) (Result: exit-code) since Mon 2017-02-06 21:08:41 CET; 1s ago
Docs: http://docs.openhab.org
https://community.openhab.org
Process: 15003 ExecStart=/usr/share/openhab2/start.sh server (code=exited, status=254)
Main PID: 15003 (code=exited, status=254); : 15203 (karaf)
Tasks: 15
Memory: 11.5M
CPU: 4.006s
CGroup: /system.slice/openhab2.service
└─control
├─15203 /bin/bash /usr/share/openhab2/runtime/bin/karaf stop
├─15348 /bin/bash /usr/share/openhab2/runtime/bin/karaf stop
├─15349 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java -version
├─15350 grep -E "([0-9].[0-9]…[0-9])."
├─15351 awk {print substr($3,2,length($3)-2)}
├─15352 awk {print substr($1, 3, 3)}
└─15353 sed -e s;.;;g

Feb 06 21:08:41 gebaudeautomation start.sh[15003]: WARN: file:/mnt/openhab/openhab2lib/etc/config.properties is not found, so
Feb 06 21:08:41 gebaudeautomation start.sh[15003]: Error occurred shutting down framework: java.lang.NumberFormatException: n
Feb 06 21:08:41 gebaudeautomation start.sh[15003]: java.lang.NumberFormatException: null
Feb 06 21:08:41 gebaudeautomation start.sh[15003]: at java.lang.Integer.parseInt(Integer.java:542)
Feb 06 21:08:41 gebaudeautomation start.sh[15003]: at java.lang.Integer.parseInt(Integer.java:615)
Feb 06 21:08:41 gebaudeautomation start.sh[15003]: at org.apache.karaf.main.ConfigProperties.(ConfigProperties.
Feb 06 21:08:41 gebaudeautomation start.sh[15003]: at org.apache.karaf.main.Main.updateInstancePidAfterShutdown(Main.
Feb 06 21:08:41 gebaudeautomation start.sh[15003]: at org.apache.karaf.main.Main.main(Main.java:191)
Feb 06 21:08:41 gebaudeautomation systemd[1]: openhab2.service: Main process exited, code=exited, status=254/n/a
Feb 06 21:08:42 gebaudeautomation stop[15203]: stop: Ignoring predefined value for KARAF_HOME

It seams the system is trying to restart and restart and so on.

Any idea? How can i completely remove OH and reinstall using apt-get?
I dont link to reinstall the os since I have a headless system witch is tricky to install ubuntu.

Try apt-get install openhab2 (it should work on top of your existing installation)