How can I change the name of my default journal?
Correct the name of my Default Journal
I don't think you can--if you want a journal with a special name you need to create a new one. Any journals you create you can name whatever you want. I wanted meaningful names for all my journals so I don't even use the default journal, I just made new ones and use those.
I suspected I hadn't quite started out right with beginning a journal. I will just start another one!