Updated to 1.6.4

If you cant login because you are still on 1.6.2 do this:

1) Run Minecraft
2) Click on “Edit Profile”
3) Look for the section called “Version Selector” and change the drop down menu option where it says “Use version:” and select 1.6.4.
4) Click on “Save Profile”

Note: EC Client will  be updated soon.