In version 0.0.7 you now got a toolbar menu. If there is at least one fe_user with the same email address as the current backend user you get a small icon in your toolbar menu. If there are more than one fe_users with the same email address you get them all shown. To define which informations you get shown for several found fe_users you can go to the extension manager and enter the fe_user db fields which shall be shown.
Take a look at the screens in the Wiki
Further there are some enhancements about security within this extension you update to the current version.