How to change image urls after a site migration


I migrated a site using BackupBuddy. Everything transferred nicely, however, the images are being sourced from the old location.

What is the best method to change all the urls of the images?

Also, I found this out by trying to change one of the four images beneath the slider. They are suppose to be pulled from the featured image of posts that are in a specific category. However, when I go and remove the image and try to replace it, the site is still pulling the image from the old url.