Yes, you can share a single image from your gallery. Single images can be emailed or shared to Facebook, Twitter, Pinterest.
The image shared will show only the image selected, and does not link back to the full Album when shared to Facebook, through email,or other social media.
The copyright at the bottom is pulled from the Footer section of the Folio. If you are seeing StickyFolios default data, then you have not updated that footer. (When you do not see your information for the copyright)
Facebook Note - when sharing a single image, it is shared as a link. It is not saved to the viewer's Facebook Photo Albums. Single images do not link back to the full StickyAlbum or StickyFolio.