Tapping on the asterisk (*) SHOULD bring up the notes. If it's not working for you, you probably have a corrupt download. Just try this:
Go to the Bookshelf
Find the NETP entry in the Bibles list
Swipe your finger over it
Tap the red "Delete" button
Then just download the NETP Bible again
Be sure to give it an extra few minutes after it says it's done downloading. What's happening is that the program is downloading the notes file (which, for the NETP, is very, very large.) It downloads and installs the notes in the background, so you might have to give it a few minutes.