Please clear data from the µTorrent app by going to (within Android) Settings, then App, then µTorrent, then Storage, then Clear Data and reboot. Then try downloading a torrent with many seeds, such as featured content (under the RSS button). If the app is still crashing, try uninstalling and reinstalling. Then, repeat the step above by trying to download a torrent with many seeds such as featured content.
If you use a Samsung device, this may not be an issue specific to the µTorrent app. Please note that Samsung device owners are reporting crashes and download and streaming issues, battery issues, and wifi connectivity issues related to an Android 4.3 OS update. Please see http://bit.ly/1bH59iS for more information.