I have over 300 torrents but when I select "All Torrents", it only shows 2 torrents. In fact, when I go through the group views, most views show 0 torrents but a few of them show 2 torrents.

Is there a way to regenerate the torrent lists?

Can you verify that KTorrent is aware of multiple torrents by checking it's configuration file and application data directories? They are usually located at ~/.kde4/share/config/ktorrentrc and ~/.kde4/share/apps/ktorrent/ respectively. It could be that they have been cleaned up automatically.

If those entries are still present, does a restart cause KTorrent to pick them up again?

Thank you for the response.

First, a restart of KTorrent does not cause KTorrent to display them correctly. A restart of the system does not help, either.

The torrents are there and KTorrent is processing them. It is not displaying them.

When I go to Queue Manager, it shows all of the torrents.

This just started happening since I upgraded to Mint 15.

KTorrent version = 4.3.1

The ~/.kde/share/config/ktorrentrc file is in place and so are the files at ~/.kde/share/apps/ktorrent.

I see. Have you attempted to change the "Folder to store torrent information" setting in KTorrent at any point?
This is quite unusual behaviour.

No, I haven't changed that setting. It is correct on the settings page.

Does the Queue Manager show any similarities between the torrents which are not being displayed? (ie. are they all Complete / Seeding / etc).

I have a similar issue. the torrent list is empty while I have more than 100 torrents.
Kubuntu 16.04 with latest KDE