How to Fix Private Mode ??? :(

Hello guys
I have rooted my S6 Edge last night
Model number : SM-G25I
I used this kernel from this thread
http://forum.xda-developers.com/gala...ernel-t3100395
but i got a big problem i can't Enable the private mode !!!
i have a lot of pictures and videos on it !
plzz guys help meee !!!
how to fix it or un root to restore the private mode
I'm sorry if this is the wrong section !