yup like tibs said, you can just load it up - it is already part of the Very Vanilla install. there's nothing extra you need to do for any of the "included" plugins other than fire it up, put your settings to how you want them, and off ya go.
this is what i usually do (type these out in game with the slash)
INI:
/plugin mq2aaspend load
/aaspend bank 200
/aaspend order 53214
/aaspend brute on
/aaspend save
this says:
Load the plugin
set my aa bank to 200 aa points - so you will have 200 points before spending any
i would like to apply my points in this order in the AA tab windows: focus, class, arch, general, special
i would like to brute buy based on those settings
i would like to save these settings
keeping a high bank allows you to ensure you actually buy still you still need to buy in that tab, it also allows for "manual intervention" if you happen to have AAs burning a hole in your pocket - i keep these settings on all the time, and i still pop over and manually spend here and there - but i'll never cap out and be sitting on unspent AA this way