So, a basic question, how do I delete an Empire?
With SM functions.
I couldn't quite get it.
I think you go to the races screen (ctrl-F2) - there should be a "delete this race" button.
Note that this might not be entirely accurate - it's from when races and empires were synonymous. So you need to make sure it's "Empire of Man" that you're deleting and not "Human". I'd definitely save the DB before trying
Also note that, although in principle everything should get cleaned out appropriately, in practice there's a lot of interconnection within the DB and you might end up with some corruption due to too much or too little being deleted.
John