Please unzip it and put to a new folder instead of original Garena folder.
Here are the Change log :
1. Remake of the internal system to make Garena more stable. 2. Minor bug fixes.
Something else you should expect in the Official 3.3:
1. Optimize networking performance to reduce disconnection 2. You will be able to use Garena Fire in Room 3. A fix for the current IM system and an interesting new feature about Messenger 4. An update on DotA Ladder to detect abusers 5. Nobu ladder will be online officially
If you have any problem in this version, kindly post in the Reporting Thread so that we can fix it asap.