I was happy to find that when I did this, it resulted in folders with the constituent notes inside them. This is great, perfect for my workflow.
However, it would be even better if rather than the autonaming “Group”, Group1" etc. it was possible to set a visible name in Scapple for the background shape container and have that as the name for the folder that appears in the binder. At the moment, I have to do a bit of messing around to get what I want.