There is a easier way to do this for those who do not have smart phones or who have bad signals....
- If you want to find the text associated with the QR (Barcode). You can take a screenshot of the QR code, which you can then upload and decode using http://zxing.org/w/decode.jspx
- http://gauth.gbraad.nl/ is a online version of Google Authenticator (Which replaces the need to download)
Your account name will look like username@CryptoCoin Exchange
You will also need to enter in the decoded QR key.