I have found an issue where if you dont have a document open "New Document" doesnt work.
So not so good for new customers.
There seems to be Chicken and Egg situation where if you dont have a Document window open then you cant create a new document.
You can get a seed document here
1. Open Seed, leave it open.
2. Create New Document and save that.
3. You now have your own documents
Its just like Sourdough bread.