Wanted to try this out - made a couple of very bare test pages, entered values on setup page, said to activate digishop and all my admin pages went away. I could see the admin menu, but selecting anything just gave a blank page. Renaming the digishop plugin page brought everything back, I assume its some php error.
Tried this twice, thought maybe it needed a product and did it once more, and sure enough everything went away again.
Nothing like making a good first (and last) impression.