Out of the 10 free images for the first month, without realizing I downloaded three images that have ai/eps extensions. It seems the only images I can work with are jpeg images. I assume this is because I don't have other Adobe products such as Illustrator. How do I 1) substitute ai/eps images with jpeg images or 2) delicense the three images and download three new ones?
I apologize but there is no such option for delicensing any image/download or substituting the license that have been downloaded.
You can definitely try to work on those images by installing Illustrator application (Graphic design software | Download free Adobe Illustrator CC trial ).
If you still are unable to work, let me know.
I hope that helps!