I did some quick Searches and haven't found anything she recorded after 1973. I have a hunch that she might still be singing under a married name, but I'm not posting anything about that until I'm sure.

Anne Byrne is a very popular name in Ireland so there are a lot of hits when searching on her name. One was married to Dustin Hoffman and had a role in Woody Allen's movie Manhattan, but I don't think this is the same person. I'll be playing in a session tonight with a few people who would have been around the folk scene in the 1960's and 70's and I'll see if they can give me any more information.