I bought it too. I think most of us seem to bought it almost 10 years ago. Don’t use it much, but it is there when needed once in a while.
Right now you can just tell claude to generate an ascii diagrama, or even svg. I did a few days ago when I wanted to share a flow diagram of one particular flow in our app.
Likewise. I can unreservedly say it’s one of my best app purchases of all time.