Can anybody tell me how to know the version of 'Pathfinder kingmaker' i wanna download the upgrades only but i can't find the old version in game's main menu or anywhere else.
Just download all the updates and if they are the wrong version they won't install so it's fine. Go from lower numbers up until you've installed everything. You may also want to download the base game from scratch and go from there.
https://www.youtube.com/watch?v=aX8_beitQf8