Thanks Creedon! I'll do it.
It looks like at one point there was some sort of file storage in Squarespace v5(?), where possibly an image could be uploaded & given a URL, then linked to a website. Do you know anything about that? Does this file storage still exist?
Actually, I just remembered something else. Squarespace says that they create multiple versions(7?) of each uploaded image. If a replacement image was uploaded they'd have to generate new versions probably with completely different URLs than the images they're replacing...hmmmm. Maybe there could be a selection button, which says, "Replace all versions of original image"...hmmm.
Thanks,
Phil