Did you try to delete the registry key it may work, I think the key is: "HKEY_CURRENT_USER\Software\NRage".
Rembar to backup you registry BEFORE YOU DELETE ANYTHING(!)
(Note: to backup your registry goto Start\Run then type regedit,
click Registry\Export Registry File\Then save it as you whant to, then select Export rang to all and click save.
This worked when a plugin stopped working on my system.