Best practise to use the App is:

1. Prepare 3D view with the only elements you need to generate their center lines.
2. Click Generate Center Lines button.
3. You will be requested to select the elements you want to generate their center lines.
4. Leave the app, it will do the job.
5. Finally you can use the data filled in comments parameter such as category, type and element id.

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will install 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 7/8.1/10/11) and uninstall as you would any other application from your system.