Hello Barry,
Which file are you trying to edit? The logo.ai file? Smart objects (i.e. vector elements) can’t be edited with Photoshop. Generally, you’d use Adobe Illustrator for that.
The logo included was a vector file created in Illustrator, and so if you were trying to edit it, you’d need to do it in Illustrator.
You’ll also need the Dancing Script font installed on your computer.