You can redownload the entirety of the game, or just the new update files and apply them to v0.17.2
so if i download 0.18 i can get rid of 17.2 also dumb question i did download the 0.18 files but how to apply them to 0.17.2?
You don't. If you download the UPDATE ONLY from 0.17.2-0.18, then you would need to apply, but I strongly suggest just download 0.18 and play.
