If you have your updates automatically downloaded in your iTunes & App Store settings on your device, you won't need to do anything as your Quickflix app update will download automatically.
If you do not have automatic updates on your device, here's a step by step on how to update your Quickflix app to the latest version.
- Tap the App Store icon on your device's Home screen to launch the App Store app.
- Tap "Updates" to show all available updates for the apps you have installed on your device.
- Next to the Quickflix app icon tape "Update".
- You may be asked for your iTunes password or e-mail address and password. Type them into the relevant fields and tap the "OK" button.
- The Quickflix app will now update.