There was no read me, but I did find the site, thanks so much.
It is the Arras Theme. I get lost after step 4 and I am not sure where the option is for step five…
Any help? Here are the 4 and 5 steps
4.Once you have successfully uploaded your image, click on File URL and copy the URL that is generated at the Link URL field.
5.Create a custom field with the name set as thumb (default) and paste the URL into the value field.