I recently moved into a new home and have not been able to reprogram the garage door opener. There was no manual left behind by the previous owners and i can not find one online. I can not figure out how to reprogram this devise, due to not knowing the previous codes. Is there a way to do this with some generic master? It is a craftsman 139.53664srt made in ’97. When I searched at craftsman, it only had the 2003-2004 manuals avaiable. Please help me!!!