Trouble with scanning barcode – Classroom Checkout Review

When I first purchased this app, I thought it was great. It was easy to use and very practical. The books used to scan very easily but now that they're using pic2shop, I can't scan my books. It's very disappointing and frustrating. I really don't want to spend money on another app. If someone knows how to fix this problem, please help.
Review by Leaner than yesterday on Classroom Checkout.