I don't think she was a current operative, but her covert status was still secret and can remain so for many years. This is to protect her contacts and others who may still be in the field. This issue still is who revealed her covert status. Who ever it was, is guity of the crime.
I know that during the time this was hot a few years back, that many reports said that Wilson himself had outed her covert role on a number of occasions at a variety of public gatherings.