OK, there was no JPG in the zip file - not sure what went wrong there, did your program open it as a JPG? Anyways, I reuploaded it with PNG, GIF, PSD and TIF versions.
Thank you I am using Unity, so I don't know what you mean when you asked, did my program open it as a jpg. Anyway, I was unable to "slice" in the Sprite Editor without the green background. But thanks for the update.