Changing Cover Image After iTunes Producer Error

iTunes Producer does not like the size of my book cover. I have shrinked the file, but having difficulty adding it to Scrivener.

I thought I would just click and delete the old one and add the new. Not so.

How do I get rid of the larger file and add the new, smaller graphic for my cover?

Thanks.
Patrice

Nevermind. Found How to video:

youtube.com/watch?v=9eePR03U81s