How do I delete (hard-delete) members?
 

I have copied my forum so that I have two identical ones - but I want the second one to ONLY HAVE THE MEMBERS FROM ONE SPECIFIC USERGROUP in the mother forum. In other words - I want to delete all members who are not members of a given groups - HOW?????

I can only find "prune", "find" etc - no "delete" and certainly no "delete all but those from x-usergroup" :)