Select the element as the base, then select the parameters to compare, and finally, all the elements with the same values of the selected Parameters of the base element, which are visible in the current view, will be selected. The parameters are grouped into Shared Parameters and Own parameters Autodesk® Revit® (System).

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.