Autodesk® Fusion 360™ interface:

• Create or open a model
• Go to 'MAKE" panel
• Click on the 'Buildapart community'
• Select the File type
• Select the model
• Click on 'Submit Part' button

Buildapart Website workflow:

• Go to https://buildapart.io
• Login with your credentials
• Under Dashboard the Fusion 360 files will be listed
• Create/open projects
• Click on the Submitted projects or start a new project
• The model will be shown in the STEP, IGS and STL file format.

Install:

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin.

Uninstall:

You can unload the add-in without uninstalling it by clicking the "Stop" button when the add-in is selected in the list box on the "Add-Ins" tab of the "Scripts and Add-Ins" dialog.
Unchecking "Run on Startup" causes the add-in not to be loaded in future sessions of Autodesk® Fusion 360™.
To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button.
OR, you can uninstall it from 'Control Panel/Programs and Features' (Windows 7/8.1/10), just as you would uninstall any other application from your system.