Hi @creativeliza, this plugin only works with blocks. So you would need to use the block-based Widgets. If you have the Classic Widgets plugin installed, this will not work.
That said, if you are using block-based Widgets, you can use the Location control to show/hide blocks based on where the block is located. So in this case you would only show the footer on a specific page.
I hope that helps.
Best,
Nick