i dont think its just for a few month. that guy sayed his key did not work after 2 years. bet he changed his pc and medics keys works only for one pc. dont get me wrong. fuck him but i dont believe he put it up just for a few month.
Every single license of his premium (paid) cheat has expired on January 1st,2016.
you can try out this tool to extend...
http://tkc-community.net/forum/index.php/topic,15608.0.html