Use usual GTK file dialog, not one you are using today.

[Denis Cheremisov]

It's horrible. Completely unusable. Huge inconsistency.
1) It's not clear how to change directory
2) What is all these options? What they are for? Is anyone really needs them on the torrent add?

In addition: why "Add torrent" and "Remove torrent"? Does anyone think it's not about torrents? If do, why didn't you use "Stop torrent" and "Pause torrent" instead of "Stop" and "Pause"?
What about ugly popup list near the "Remove torrent"? Even modal window with removal suggestion is better approach in my opinion.