Hi. I want to remove a tracker address from a few hundred torrents. Please help.

If you don't want to announce that tracker it would be easier to add the URL to the Skip Announce list in Individual Tracker Options.

Actually I was trying to find a way to clean up my tixati, because I have 2000 torrents loaded in it and since two days ago the user interface started lagging. I managed to somehow delete ALL my trackers in the process and had no backup (restarted tixati again after that). But I recovered most of them because i had them in categories by trackers. So now I have no skip announce rules, but the user interface still starts to lag after a while.

Any suggestions how I can debug this?