When you start a new file, and you don't get a blank show, you probably have a Default show recorded into the server.
How do I get rid of the settings that I set with the Default.ecs show and start with a completely blank document?
You will need to delete the Default show.
You can do this through Windows explorer. Default show is in the save directory which is on the D drive, ETC, then the shows folder. If you want to return to this show later, save it as a different name.
Alternately you can reprogram and resave the Default.ecs file.