Hi 0be1, pasting that code into the functions.php did the trick, many thanks!
I’m no PHP coder, so I don’t understand how it works exactly, but if anyone needs basic steps here’s what I did:
1) Find functions.php in wp-content/themes/my-theme-name
2) Make a back-up of the file first in case you screw it up.
3) Add the code provided by 0be1 above at the end, before the closing PHP tag ?>
4) Upload the amended file and see if it works!
Thanks again!