Click on the push button in "Find CAD" panel in "Addins" Tab.

In the pop-up window Fast Commands-FindCAD displays all imported and linked CAD files information with ElementID, Name, and Owner View Information.

Check your unnecessary CAD files and go to Owner View and delete from project or select CAD file by using Element ID and delete.

If you want to purge All CAD files from the current project to make a CAD free model click on Purge, otherwise click on Close to the current window.

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.