Run the MLeader+ command or choose the ribbon button from the Add-ins tab to launch the MLeader+ app dialog. 

Works with objects of the following types:

Coordinates-where you point

Area-POLYLINE, 3D POLYLINE, CIRCLE, ELLIPSE, SPLINE, AREA, HATCHING, SURFACE, NURB-SURFACE, 3D BODY, NETWORK, 3DFACE

Volume - a 3D object

Length-LINE, POLYLINE, 3D POLYLINE, SPLINE, CIRCLE, ARC, ELLIPSE, REGION

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) and uninstall as you would any other application from your system.