Software Update: qBittorrent 4.2.1

Version 4.2.1 of qBittorrent has been released. This open source torrent client has versions for Windows, Linux, macOS and FreeBSD, and shows no ads. The program is with Qt developed and based on libtorrent (raster bar) and boost. The program is the brainchild of French student Christophe Dumez, who has been working on it since early 2006. Today it is maintained by the community. In version 4.2.1 the following changes and improvements have been made:

qBittorrent v4.2.1 release

qBittorrent v4.2.1 was released. Due to libtorrent fixes, UDP through proxies should work again. In some cases it also caused crashes.

ATTENTION: There’s a slight change in the way network interfaces are configured. If you have a specific network interface/local address set in the Advanced Settings, go and make sure that your settings have stayed the same. The extra setting for Listen on IPv6 address has been removed.


  • Enable portable mode if “profile” directory exists
  • Enable “Apply rate limit to peers on LAN” option by default


  • Sync translations from Transifex and run lupdate
  • Don’t unnecessarily delete OS files in folders
  • Use the incomplete folder where appropriate
  • Align Properties tab bar correctly on window resize
  • Rework the listening IP/interface selection code
  • Fix inconsistent icon for deleting torrent
  • Show torrent error message in transfer list
  • Fix stuck in wrong torrent state
  • Expand single-item folders in torrent content


  • Bump Web API version
  • Add ability to rename torrent files from the WebUI
  • Mention lack of HTTPS in WebUI magnet link warning
  • Fix HTML elements size in search tab


  • Fix incorrect translation displayed after language change
  • Fix missing translations in search plugins dialog


  • Update russian translation of the installer

Version number 4.2.1
Release status Final
Operating systems Windows 7, Linux, macOS, Windows 8, Windows 10
Website qbittorrent
File size 24.57MB
License type GPL