ARO Export not working


I am not able to add ARO Export in Blender 2.57a.
I went to File>>User Prefrences>>Add-Ons>>Import-Export>>Install Add-On and installed file.
Now the file is showing in C:\Program Files\Blender Foundation\Blender\2.57\scripts\addons folder.
But I cannot see the ARO Export option in File>>Export menu.
Am I missing out something here?
Please help.



Blender 2.49 only

Blender's python interface changed for 2.5. Until we release an update that adds 2.5 support, you'll have to stick to Blender 2.49 I'm afraid.