Updating Game

Hi, sorry if this has been posted and asked before. I tried searching but really couldn't find any thread about this.

If i have download an iphone game. Just an example:
zenonia 1.0

when they release 1.1, how am i suppose to update my game? Do i re-download the game again? Do i need to pay?

Go to the AppStore on your iDevice. It should look like this:
(Not my screen shot!)
The red 4 says, that there are 4 new updates. Now hit the Update button and download the update(s). Most updates are free.
Greetings, Ryuk.

Ah thanks alot! [: I have 10 finally i can update my game. Much appreciated!