I made some changes to my (published) book file without saving the original, assuming it ask if I wanted to save changes (I’m used to Photoshop!) can I restore it to the way it was or do I have to start from scratch? Is there a way to retrieve the original file that was uploaded to Blurb?
YES: I believe Blurb can provide a link or a means for you to recover the original file… I’ve seen this discussed before in the forum, but I can’t find the entry right now…
I suggest you file a support request with Blurb here…