protected File doGetUserApplicationSettingsDirectory() {
		try {
			return ApplicationUtilities.getDefaultUserTempDir("application.settings");
		}
		catch (IOException e) {
			Msg.error(ApplicationSettings.class, "Error creating application.settings directory",
				e);
			return null;
		}
	}
Aha!  This is where any potential subclasses can update the returned value.

@return the directory into which application settings are stored per user, per 
		   application version.
Ghidra/Framework/Utility/src/main/java/utility/application/ApplicationSettings.java