Three image links are pointing to an incorrect folder

I have three image links pointing to an incorrect folder. The path is wrong. They are pointing to the old folder that the site was built in. It had a /dev extension. When site was moved to https://www.markthompson.org from the https://www.markthompson.org/dev all moved except the header image and two footer images. I can click on the box where they should exist and I am sent to the correct page. The functionality is there but no image.

I respect all of you who are computer wizards, unfortunatly I am not. This was built for me, but the guy who did it does not know how to solve this.