At the moment, the 'scenes' feature is not available in the production version of Sketchbox because of a build error, to use Scenes - and access any of your existing Sketchbox projects that have scenes, you need to switch to the 'Scenes-legacy-support' version of Sketchbox, on Steam.
Switching Sketchbox versions will NOT affect any of your saved work, or any of your import folders.
See video below for instructions:
https://www.youtube.com/watch?v=LGiNCU8DYEI&ab_channel=Sketchbox
Scenes will be returning to the production version of Sketchbox within a few weeks and we apologize for the confusion.