It has been like that for a long time. Many years I believe. There is an option to download clean versions on their website. "Download > Show Additional download options" is the page you are after.
If you check the filename of the windows installer you download from the frontpage the name is FileZilla_Version_Sponsored-setup.exe
The installer available from the link above does not contain the word "Sponsored" and the installer is 2.5 MB smaller.
Additional. Windows Defender tries it best to prevent you from installing the version found on the frontpage due to the adware. It has no issues with the other installer.
Switch to using personal accounts instead of having shared loginS. That goes against all security best practices (and GDPR) also. Use this opportunity to bring your things in order
What other options do they have? Even on HN you hear "I use Egde to download Chrome". Many of you here don't test your own work in Edge. At the same time Microsoft is getting the heat that Windows 10 is unstable and the last major update shows that it is. Very urgently, I imagine, Microsoft is trying to change the perception of Windows 10 by doing everything they can to make it more stable. Changing the browser engine is a big step in that direction. It is a step they have to do because.. and now comes the down votes... YOU don't test your work in Egde and because YOU tell all friends and family to use Chrome instead of edge. I bet many of you even helps friends and family in downloading it. So stop complaining about monoculture. Many of you helped create it.
Well. Russia is basically and dictatorship with only one candidate (Putin). So no opportunity there for anyone to hack the election there. It appears to be not very common for one country to interfere with another countries election... if you forget about how CIA tried to interfere with almost everything in Middle America in the 80's.