Well, I have 1 more question: how to deinstall kernel power completely with all relevant folders, settings, configs etc. So it would feel like it has never been installed before.
I`ve succesfully uninstaled it via xterm and second time via special app, however still i suspect that some settings that came out with kp47 still remains in the system. (eventually if you try uninstall it with app it says that "setting will be kept but wil have no effect" - [logic]until you install kernel once again[/logic]).

Previously when i had kp46 when the device was booting up there were some coding on the screen with some options to choose (i believe it has sth to do with multiboot), and after upgrading to kp47 those xterm stuff was no longer visible. Even though I really dont care about this "coding on the boot", there is a strange fact that since i deinstalled kp47 and installed kp46 once again that "coding on the boot" didn`t reappeared, which actually makes me think that kernel versions have some setting files that are remaining on the device even when you deinstalled kernel.

So, could someone please point me what to erase to make system forget about kp completly?