I have just installed UG pro and tools on my Samsung G4. When playing the tabs I try to turn on music but it says no music in my library - where is the library located as I have loads of music on my Samsung and want to point it to the app?

i just have a quick question i pay for the app on the computer do i have to pay for the app on my phone as well?
I deleted all my application data, for a problem with another app, and then the TABS app let me listen to songs in my library when I pressed the clef! Must have been old data from when I first installed the app stopping it.