Yes, you can migrate to GreenAddress. There are two ways with which you can migrate to GreenAddress. The first one is by simply hitting the Receive button on the dashboard to send all your coins to your GreenAddress wallet. The alternative method requires that the exchange account be one that is supported by GreenAddress. This way you can connect the two and get a direct pathway. In this case, you will not need to provide your QR Code; rather the coins will be sent to you once you release them on the specified exchange platform.