Andy,
I used to have more users yes and no, I don’t remember how I deleted them, if from the WP User list or from the Forum User list, for sure if I did the latter I would have checked the first too to make sure the user was gone from WP too.
I went from the admin panel of the blog to phpMyAdmin but I only see the WP tables, users included, and there are only the current users. I cannot find sfmembers. I can access the files of the blog though, through Filezilla… any use? Sorry but I am not too prepared about the database behind the blog…
Having said that, is there any way to rebuild the forum somehow?