You'll have to go through the process like you're paying for this - but you won't be charged anything. When you get the Thank You page, click on DOWNLOAD NOW. All available flip charts will be shown on the left. Click on the one(s) you have purchased music for and they will automatically download to your default download folder.
*You'll need to do this on a computer, not your mobile phone. Then you can transfer it to a mobile device if you need it there.