Plugin not working for my dev site

My website is saucemonsters.com. My dev site is dev.saucemonsters.com. I am on inmotion hosting. They built me a dev site but none of the images are working. They ran an analysis and claim it is the ewww plugin. They said they cannot fix the issue and suggest I reach out to you. This is their full statement.

After closer examination, we have changed everything necessary for dev.saucemonsters.com to work properly however there is a plugin called ewww image optimizer that has been installed that is interfering with the images from loading properly.

This is due to the fact the image plugin is using the references for the saucemonsters.com and not the dev.saucemonsters.com folder as it should be using.

Our tools don’t specifically look for the database table that the ewww image optimizer uses so it cannot change them and any changes we do make could potentially interfere with dev.saucemonsters.com stability and ability to operate normally.

At this point in time we recommend that you contact the plugin developer to enlist their services in what needs to happen after a site move.