Hey Mushrooms!
I believe you should hit File and there should be an option to save a copy. I didn't make the sheet tho so I can't say for certain. As for the art, I'm not sure what you mean by maps, but we have an art drive we've made publicly available, and you're very welcome to extract the images from the book (if you rename the PDF to a .zip it should allow you to unextract the contents). I'll follow up this comment with a link to our drive when I get back home.
Nem