I'm certain many more people other than just the OP have run into this problem. I've encountered it dozens of times. Often with simple enough scrapes that I just recreate them. I've far too many scrapes today that are too time consuming to replicate each time this happens.
I've hit the problem yet again today. I found this post which has indeed helped me find my sitemaps in the console. My pertinent followup question though is - what is the best way of getting the sitemaps out of the console view and into a backup? If it's a matter of manually copy/pasting each sitemap then my question is how do I do so reliably - as the console display is a tree hierarchy that is in a different order than how the sitemaps are constructed within the extension itself.