All scores purchased on Noteflight can be found in the "Purchased Scores" section of your account.
First, login at www.noteflight.com and select "Purchased Scores" from the left hand menu on your home page.
There you will see the list of scores you have purchased. Select any title to access the full version of your score.
Once opened, select the Print button to choose your desired printing option.
You can also save a copy of your purchase into your "My Scores" section for full editing capabilities by selecting the "Edit Score" button.