Default [Q] Help needed related to Root..

i was trying something and by mistake deleted some files and in those files root files were there so i lost root access.
i tried root checker and it says "No ROOT ACCESS".

I am curently using slim kat 4.4.2 (which comes with TWRP recovery) and want to root the phone again...

so what should i do now i mean just flash root file by SHAAN in recovery of slim kat (TWRP) or Flash stock rom 4.1.2 and do root thing etc
or is there any other way..?
if there plz tell...

THANX!