This was done in a clean install of WordPress 2.7 and a clean install of AZIndex plugin in a testing environment. I don't know if this will work for a existing plugin installation and WordPress upgrade. Check on a development machine if you want to be sure.
az-index-admin.php line 49:
appears that it needs to be:
in order to add new indexes. At time of writing the plugin is in the menu 'tools' therefore the path change.
Plugin and output appear to be working fine at first glance. Further testing is of course needed to be sure.