How do I change my website back to the old sitebuilder?

I need to find a way to change my newly created website back to the old sitebuilder. I have an old system that is not compatible with the new one.
I used to recommend this web host all the time because it was so simple. I have been with this company since before it was a pay site and I don't want to change. Is there any way to automatically make my web pages use the old site builder?