It also says “free of installer bundles” while (at least in past, don’t know about now) their default windows installer was including ads (source)
P.S.: If you want to disable the in-app ads, here’s how to: https://gist.github.com/yunooooo/87564a0293a1c7a53fb3e233a604c638
I wrote a blog post about how to remove the ads and enable dark mode for JDownloder2 here.
You can also get it to use your KDE theme if that is more your thing
Edit: gtk theme, not kde
How?
I was mistaken and said KDE rather than GTK theme but you just need to add this add an environment variable before the operator on the desktop shortcut file and it should work
_JAVA_OPTIONS="-Dawt.useSystemAAFontSettings=on -Dswing.aatext=true -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel -Dswing.crossplatformlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel ${_JAVA_OPTIONS}"I didn’t know that. I’ll try that and maybe make an edit and mention of it in that blog post