I see 'open diagram' as a greyed-out option on the File menu in various contexts. I don't see a place from which I can open/import a diagram, e.g. one that I have loaded from a different system (nor to open a 'project'). I also don't see a place to set properties of a 'project' or of a 'folder' (nor am I clear on the difference), and I don't see these issues addressed in the documentation. Thanks for some more depth on this.