This project is inactive and its default file will likely not work with the most recent version of Minecraft. The author may have abandoned it, or it may have outlived its usefulness.
This plugin is a add-up for WorldEdit and also Groupmanager. It allows you to run the commands smoothly without any lag being caused on your servers. It also allows Groupmanager to know what rank/group a player is supposed to have instantly without lag to the players rank/group.