I created a Trac account for bug reporting at https://trac.cyberduck.io/
but I've not had an email arrive to verify with (nothing in Spam folder).
I'm trying to log a (minor) bug report with the installer for Cyberduck-Installer-184.108.40.206974.exe on Windows 10.
I get a pop-up near the end of installation:
Other that that install appears to be fine (shortcut works).
As a quick test I installed into an old Windows 8.1 test machine and it worked fine without any errors during install. I don't need a fix, this is an FYI.