If you have an iPhone or an Apple device and you want to change the registered email, this is how you do it.
- First download the latest iTune Software and install it
- Run the iTunes Software
- Connect the iPhone or the Apple Device
- Then in iTunes go to STORE
- > VIEW MY ACCOUNT
- > Click on EDIT ACCOUNT INFO next to your Apple ID
- Change your email address and click DONE
When you get back into iTunes, click on STORE > DEAUTHORIZE COMPUTER
Then STORE > AUTHORIZE COMPUTER
Your iTunes purchases will play fine and sync fine