kodi 17.2

I cant find anywhere on how to update kodi to 17.2 from 17.1 on my raspberry pi.. and before everyone says theres guides just search… i am not sure what my image is using as a distribution.. unsure how to check and been searching for a couple hours and getting annoyed… Im not using libreelect or whatever or openelec… how do i find out what im using… as kodi is just on emulationstation and when i click it it opens normal… so please any help would be appreciated…