Please don't recommend chocolatey for this reason. While it's excellent, you should probably check the install file first: https://chocolatey.org/packages/filezilla (and click "show" on "tools\chocolateyInstall.ps1")

You don't see the installer UI, but it still downloads from sourceforge because that's where the executables are stored.

Unless ninite is building everything from source where do you think it's getting the installer binaries?

It's much easier to simply download the portable version (without malware) from FossHub.

http://www.fosshub.com/FileZilla.html