• Invoke FM Gears from the Model-> Create menu.
• Select a tab on the FM Gears user interface for the type of gear to create.
• Fill out the gear parameters as desired, including thickness for extrusion.
• Click OK to dismiss the dialog and create the extruded gear body.

Install:

The installer that ran when you downloaded this app/plug-in from the 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 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.

FM Gears requires Microsoft .NET Framework 4.7 and Windows 7 or later. (Up-to-date Windows installations should already contain the latest .NET Framework.)

GearDXF is a standalone Windows program, similar to FM Gears, that supports the design of Spur, Internal and Rack gears which can be exported to 2D DXF and SVG files or 3D OBJ and STL files. It is highly interactive and can export DXF files for import into Fusion 360.

See the GearDXF support page.