WP Booklist Page blown up

WP Booklist was working really well on our site till recently. When first set up, there was an option to either use the default library or create a new library. I created a new library. Recently though the page appears to be a “ghost” of what it was and unusable now. Going into it it seems that the new library was deleted and only the default library is available. Yes, I’m willing to redo the entire library using the default library, but can I get the old library back?

The page I need help with: [log in to see the link]