Clicking "show additional download options" takes you to https://filezilla-project.org/download.php?show_all=1 which has links to "clean" versions of the client.
Sidenote: It was Windows Defender which pointed out to me that I had downloaded "unwanted" software, otherwise I might have missed this before running the installer since I had downloaded FileZilla many times in the past without having to worry about it being bundled with unwanted stuff.