Start "SMART UNHIDE ELEMENTS" by clicking the icon on the PROISAC tab.

On the Form, Window select on the left panel any element and you will preview on the right panel the information about the location of the element in the SELECTION TREE, and the GRID LOCATION of the element (if there is information available).

Use the FILTER feature to find elements just by typing part of the name of the element on the textbox.

To Unhide the Elements you need to select them on the left panel (single or multi-selection) and click the UNHIDE button.

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 7/8.1/10/11) and uninstall as you would any other application from your system.

Some users behind a Firewall or proxy may have problems to activate the add-in. Please follow the instruction on the link to solve proxy problems.

https://knowledge.autodesk.com/support/autocad/troubleshooting/caas/sfdcarticles/sfdcarticles/AutoCAD-requests-to-Autodesk-servers-blocked-by-proxy-servers.html