This is a great plugin. This question is not a problem with it but a how to. There are a number of tables it finds that have obscure names that I don't recognized. A long time ago I found what looked like the repository of all the plugins for wordpress. I did a search on it and found some code I was looking for. Now I can't seem to find it again. Is anyone aware of a place to search for table names created by plugins?
Also I will re-ask the unanswered question below, how does this plugin know if a table is being used or not?