Mask AI has no place to add a background image

On the right hand side of the attached image (below the “Foreground” Image and above the “MASK MODE ?” there should be a panel that one clicks on to add a background image. It is not present and there is no scroll bar to access the “Add Background” Command."

Here is the image.

Search on YouTube or the main Topaz Labs website. You can replace any part of your image.