If I purchase the Piano/Vocal version of a song, and then decide I want the full orchestration at a later date, do I have to pay full price for the Full orchestration version?

If you purchase a lead sheet plus piano for $7.95, and then decide to upgrade to the full orchestration, you will not get credit towards your orchestration purchase. If you have Gold credits and you download a lead sheet plus piano for credits, you will still have to pay the full $49.95 to upgrade to the full orchestration version of that song. However, if you have Diamond credits and you have purchased a lead sheet plus piano version of a song, you will be able to upgrade to the orchestration of that song for the total credits of the orchestration, less the credits paid for the lead sheet plus piano.