That window indicates the download is already taking place to some default location. What do you see when you click the little green down arrow head?
It doesn't do anything except make that window/pop-up larger or smaller. In both states the same information is displayed.
What application is being used would be that which is set?? as default from the Browser being used, and the default location the one set for that application.
I'm not really sure what you are asking here or where I would go to find the info you are looking for. Under Default Applications the web browser is Chromium, the Window manager is KDE and the File manager is Dolphin.
It's definitely Ktorrent that is responding, some torrents do eventually land there.
Sounds like the solution is getting closer.
Looking in Chromium, does it show Ktorrent as the default? If so Where does Ktorrent download to?
Being as Konqueror, Kget, and Ktorrent are all KDE apps, and integrate well, I use Konqueror to do the torrent searches and the magnet selections. Before there were magnets, I had Kget, integrated with Konqueror, set to d/l just the .torrent file to the individual location of my choice, not do the actual torrent d/l. When I started seeing magnet links I started using them, and the windows previously shown were already set for use, evidently as part of the previous configuration for downloading the .torrent files. Being as it's always worked like this, and never had any issues with the downloads, I've seen no reason to change anything.
I had pretty much the same setup on the older KDE3 versions of PCLinuxOS. I'm not at all familiar with Chromium, as I've only run it a few times and didn't like it. Most of my general browsing is with Opera, or Konqueror. Konqueror is my preferred browser for any type of downloads, because of it's integration with Kget. I use Firefox to administer the forum mainly because of the Colorful Tabs extension, so I can easily find my way around the 16-20 standard tabs I usually have open.