DeRegistered 0.4 had been open sourced under the GNU GPL license.

DeRegisterer is a program to deregister WPS Classes.
- Binaries and Source code: http://hobbes.nmsu.edu/h-search.php?key=DeRegistered_0-4.zip
- Github Repository: https://github.com/OS2World/UTIL-WPS-DeRegistered
- URL: http://www.os2world.com/wiki/index.php/DeRegister
Special thanks to its author, Jens Glathe, for releasing it open source.