Username change

Unmaintained Username change 2.1.1

No permission to download
DO NOT INSTALL ON VERSION 2.2.2, it will wreck your database! It's taking me hours to figure out all the damage its caused.
Addon doesn't work, fails to recognize usergroup hierarchy. Developer has not responded this or other plugin issues.
Fantastic add-on, one that is much needed (you'd think it would be core functionality by now). Keep up the good work my friend!