[HOW TO] iTunes Store download songs which won't show up in your library but say"Purchased"

Open iTunes (Windows or Mac)

Go to Home screen (as shown below):

On right Corner see column and find Purchased (see below):

Follow the link.

Once Purchased will open up you will see albums which are not in your library. To download them simply - press cloud icon (see below):

Download will begin!
Once downloaded you will be able to listen to it or send right to your iDevices as usual.

This Guide also applies to HOW TO GET YOUR U2 - Songs Of Innocence Free Album.

Thank you U2 and Apple Inc. for an great gift!