Scroll to the bottom of the page at the above URL for the download links. Note that there are both 32-bit and 64-bit versions. It is a no-install/stand-alone executable — just unzip the file and run the EXE.
When you run it, you'll see this Search Options dialog:
There are a boatload of options, including a Summary Mode and a Duplicates Search. Spend some time experimenting — it's a fantastic (free!) tool. Regards, Joe
https://windirstat.info/