Yes, when you print out notation, you can add a title and the author's name. Before you print, click on the Project tab in Mixcraft and select the "Author Info" option. Type something in the Tile field and the Author field and then click OK to save.
Select the instrument clip in Mixcraft, then choose the Sound tab. On the Sound tab, click the Velocity setting and look for a setting called "(120) All Sounds Off." Choose that, then right-click in the area to the right of that setting and choose "Delete All Controllers."