"There is also a menu item within Band-in-a-Box® to return many settings to their factory defaults (Opt. | Return to Factory Settings). This will not necessarily return ALL settings to factory like deleting the files listed above will."

So... one might ask a question, what RTFS ALL button does in BIAB? if not that ^

If it (GUI menu) doesn't return ALL the settings, as it states, it should be named something else.... or do exactly what it says, closing out and restarting the program with fresh set of ALL config files.