I got washed-wrinkle[.local] and I don´t like it. I tried modifying the /etc/hostname but it didn’t work. I can still access through the aforementioned wrinkle, but not using the one that I set up in /etc/hostname.
StartOS is not quite like other Linux distros that you might be used to. The ability to change the unique .local address is not currently supported. You can follow this issue to add a feature allowing the changing of this name, but it is a low priority at this time.
I’ve moved this to the troubleshooting section so that I can mark it as an answered question for others to find.