The problem is I have just a 4 tile jump height instead of the 6 tile in Terraria. It is really really annoying and I don't know why did this happen. I cant find anything about it at the internet, just keep searching but I can't find anything. Does anyone know how can i get back the 6 tile jump height? I have the game on steam, 126.96.36.199
The game has no way to obtain a jump height of 4 blocks, you can see all the possible jump heights in the game in this infographic from reddit user DataNalle.
I would try reinstalling the game from scratch. So long as you backup your save data (located in
Documents\My Games\Terraria\ on Windows and
Library/Application Support/Terraria on Mac.) you should be fine reinstall/verify your game.
Verify game cache: Right click game on library list > Properties > Local Files > Verify Integrity of Game Cache
Delete local content: Right click game on library list > Delete Local Content...
If none of this works and your not completely adverse to cheating you can use http://yal.cc/r/terrasavr/ to give yourself a jump boost buff/item which my help.