Remove THEME BY ANDERS NOREN in footer

Heya… I am trying to remove the credit footer in Hemingway theme, and saw another closed thread with this advice… but it has not worked. Wondering if any other ideas? I’m a relative newbie, so hoping something simple, or I’ve messed up something in the below instruction?

Thanks!

Install a custom CSS plugin like Simple Custom CSS, and enter the following code:

.credits .fright span { display:none; }

That should do it.