Open the add-in's Settings and define the family folders you want to use.

Open the Family Manager dock panel, adjust the display settings.

Browse the structure or search for a specific family or type.

Double click a type or use the context menu to start placing a new instance.

Insert the instances, as usual, complete the command with entering or Cancel.

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.
You may need to restart the Autodesk product to activate the app/plug-in.
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, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10/11) and uninstall as you would any other application from your system.