The app provides a new way of easily printing models designed in Revit. Just open the model you want to print and hit the ‘3D Printing App’ button. The whole file will be printed. You can find the 3D print button under the tab ‘Add-ins’.

The installer that ran when you downloaded this plug-in from Autodesk App store has already installed the plug-in. You may need to restart the Autodesk product to activate the plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer by downloading it again from Autodesk App store, and select the 'Uninstall' button, or you can uninstall it from 'Control Panel\Programs\Programs and Features' (Windows 7/8/8.1/10) just as you would uninstall any other application from your system.