Make sure you have the latest version, Auto EQ v1.1
at the time of this reply.
In the Equalizer window, make sure that the reqular Auto presets is disabled. That will prevent the plug-in from being overridden.
The plug-in matches the genre tag to the preset name. In other words, if a media files has a Rock genre, the Rock preset will be loaded, Jazz genre will load Jazz preset, Blah genre will load Blah preset and so on. However, it has to be a exact mach, example: Country Rock genre will not load a Country preset.