I have a system that was programmed by software. Is it possible to now make changes or add devices using the manual programming method described here - http://www.lutron.com/TechnicalDocum...044-254b.pdfIt It says "The first time Add Mode is entered on a Main Repeater, it will create a new system with a unique system address" which leads me to believe that manually adding devices will wipe out anything previously programmed. Is that correct? If so, is there any way to add dimmers or program keypad buttons without the software and without wiping out whatever was previously programmed?