Run the interference check tool in Revit: COLLABORATE->INTERFERENCE CHECK->RUN INTERFERENCE CHECK.

Save your results in an HTML file.

Run CLASH HANDLER in a 3D view and select the HTML file previously saved.

Easily navigate and find all the clashes in your project.

You can use the VIEW DATA button to visualize the complete data and select easily which CLASH to review.

Now you can also use a FILTER to search all the data and view only what you need.

The installer that ran when you downloaded this app/plug-in from the 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 activating the add-in. Please follow the instruction on the link to solve proxy problems.

https://forums.autodesk.com/autodesk/attachments/autodesk/78/504135