This is not a independent stand-alone-installer, it installs Ashampoo-Connect (v1.6.50.38828) first, the control central for downloading it.
Another free installer for Ashampoo Uninstaller installs the Ashampoo-App (v2.0.0.0) first,
https://www.ashampoo.com/en-us/duplicate-file-finder
https://cdn1.ashampoo.net/downloader/10101/ashampoo_duplicate_file_finder_37819.exe
Any idea how to get the real installer alone?