OK, I read the hot fix post (again, again, again...)
https://www.mobileread.com/forums/sho...postcount=1597
And repeat the process:
1. put the file:
2. Check if I got the proper device for the file:
3. Update via settings menu
4. watching the output:
Didnt see the ***JAILBREAK*** message...
Officially: I dont have any idea what to do next...