License Key

Hell Guys, i have got ips 4.2.8 and when i installed it i faced ( License Kay ) and i don`t know how i got it or how can i do that ..
pleas, help me

you dont need license key for nulled version, just explore arround in here

Why did you obtain 4.2.8 when there are much newer releases out there, Im using 4.3.6 as it contains Hooks the new version does not until the hooks i use get updated im stuck.