1. Go to the JDS tab in the ribbon bar and click over the Center Gravity button.
2. Prepare the elements of the model that will form the set to which the CG will be calculated.
3. Select them; CG will be displayed automatically.

The expected result, the calculation of the CG of the selected element or elements as a whole, is presented in two ways, the first separated by its X Y Z values and the second as a vector (X; Y; Z).

Subsequently, a red point labeled with the previously calculated vector will be placed in the corresponding coordinates.

It should be noted that the vector is calculated from the internal origin of Revit and its values are expressed in the unit of measurement used in the project in question.

If during the process the CG is not displayed, verify that the visibility Generic models category is activated.

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.

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 7/8/8.1/10) and uninstall as you would any other application from your system.