For me it seems that it is the same.
Exactly what is the problem?
Do you have a hidden bar with buttons?
How did you do?
Before try the following advice, be sure that all functions of LMT or button savior work (back, home,...).
For me it didn't work until I replaced SuperUser by SuperSu.
In order to hid softkeys, You can use differents applications, like: HID bar, GMD gesture... But I don't like it because it always remove your deskop or hide the top and bottom bar or others bugs.
Me I use this one, but read till the end:
Full screen toggle:
http://xdaforums.com/show....php?t=1497558
After disable nav bar, you need to restart your phone.
But It's little bite more difficult, because the app doesn't restore the softkeys bar.
In order to retrieve the bar, I use ES explorer with root permission.
I go in system folder, and I modify build.prop.
You juste need to write directly on the phone:
qmenu.hw.mainkeys=0
Save in ES explorer, reboot, the bar reappears.
After you go to the same file and add:
##qmenu.hw.mainkeys=0
Next time you want to restore the bar just delete ##.
enjoy the full screen!!!