You can pre-select the MEP element(s) and then click on the Tab Select+ button on the Ribbon Panel, and it will search for all or any elements connected, which will be added to the previously selected element(s).

Or

You can click on the Tab Select+ button then select at least one element from the MEP selection, click the ‘Finish’ button on the Ribbon Panel. Afterwords all pieces will be selected and added to the previously selected element.

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