Command: SUMA (Sum Area)
Sums areas of selected objects that have an area property and copies the sum to the clipboard (hatches, polylines, regions etc...)

Command: SUML (Sum Length)
Sums lengths of selected objects and copies the sum to the clipboard.

Command: SUMSETTINGS
This command allows the user to set and save default decimal symbols of the value returned by SUMA and SUML commands.

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.