How do you change the default view in the JSON editor? You can easily set the default view, either Grid or Text, using the "File extensions" page of the "Options" dialog:
File extensions page of the Options dialog
You can do this for each file extension separately. It is also possible to add new extensions to the list and there is also an option to set the format, XML or JSON, of the file type.
The customer also suggested adding a new setting to the editor: "Create new document on startup". Maybe I'm going to add this option to the application. It is our main goal to provide the best JSON editor experience as possible. However, you can also always press Ctrl-N to quickly create a new document in the JSON editor.