Can't change a name on account page

I logged in and in my account page I have all the data filled except for the name. How can I change it?

In the top right you’ve got your profile picture. Click that, then click your username in the menu that pops up. That gives you your configuration page, and the far right Preferences tab is where you set your name.

Make sure you hit Save Changes because I kept forgetting that while I was writing these instructions. It’s at the bottom. Check out the other options too.

Right, I’m sorry to confuse you, but I probably should have been more clear. The account page I’m talking about is the one for the shop .)

Here’s the screenshot:

Just email me what you want it to be and I change it.