Installing the add-in, you find it down under solid/create.

Starting it, a wheel is shown with standard settings and a window to change settings. 

Changed settings immediately lead to a new wheel preview.

If you give in parameters that do not fit, a failure message with advice will appear and no wheel will be drawn. Just change the given setting, and the wheel will appear again. 

The app draws a useful number of waves around the wheel. With the setting "Rope Flexibility," you can enlarge or reduce this number. 

The setting "Make Gear" automatically combines the two pices of the wheel by a 3D-printable gear. If you turn it off, the pices will just be plugged together

The setting "Gap" enlarges or reduces the space between the two parts.

As soon as the previewed wheel meets your demand, press OK. 

Install:

The installer that ran when you downloaded this app/plugin from the Autodesk App Store will start installing the app/plugin. 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.<br>

Unchecking "Run on Startup" causes the add-in not to be loaded in future sessions of Autodesk® Fusion®.

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 10/11), just as you would uninstall any other application from your system.