All scores purchased from the Noteflight Marketplace 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 from the Noteflight Marketplace. 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.