Doesnt work for me

I have downloaded this and tried to use it several times. It opens fine on my Mac Mini with 10.8 + and chooses the camera (Logitech HD 720p). Whe the scan screen opens I can see the QR code but nothing happens. I tried it with several different sizes of QR codes and tried holding the camera rather than the object with the code.

revgsmitty about QR Journal