sudo apt-get update
sudo apt-get upgrade
will update / upgrade Raspbian. I normally run those first, before doing anything else.
curl https://get.pimoroni/uptodate | bash
I believe only updates “previously” installed Pimoroni software?
So that begs the question, was the Unicorn Hat software already installed?
If no, Jacks instructions will sort it out.
If yes, I’d run what Jack posted anyway, it won’t hurt anything as far as I know and it will then get you your Pimoroni folder. In that folder you will see a unicornhat folder with an examples folder ect in that.
If things do get messed up after running the one line installer, I’d start over with a fresh Raspbian image and just run the one line installer for the unicorn hat.
curl https://get.pimoroni.com/unicornhat | bash