N2c has not updated Warcraft 3-The Frozen Throne to version 1.24 yet because Bored Aussie has not done it. You can still play Bored Aussie with version 1.23. If you would like to play Version 1.24 in Garena  or Battle.net, you can just update it by click Battle.net of Us West server. You can manually update it by "my computer"-\\movie2\games\patches- double click the standalone patch "War3Patches_TFT_124a_enUS.exe". 

N2c will update the version 1.24 as soon as Bored Aussie does it.