I forgot my UI lock password

You locked the qBittorrent user interface and forgot the password you used? Don't worry, you can recover from this.

1. Exit or kill qBittorrent process.

2. Open the preference file with a text editor.
   Windows
   %APPDATA%\qBittorrent\qbittorrent.ini = C:\Users\<username>\AppData\Roaming\qBittorrent\qbittorrent.ini
   Linux
   ~/.config/qBittorrent/qBittorrent.conf
   macOS
   ~/.config/qBittorrent/qbittorrent.ini
   

3. Remove the following lines:

   [Locking]
   password=<encrypted_password>         # this only appear on qBittorrent version < 4.2.0
   password_PBKDF2=<encrypted_password>  # this only appear on qBittorrent version ≥ 4.2.0
   locked=true

4. Save the file

5. Start qBittorrent again

Before qBittorrent v3.3.6 on macOS

1. Exit or kill qBittorrent process

2. Open a terminal and run the following command:

   defaults delete com.qbittorrent.qBittorrent Locking.locked
   defaults delete com.qbittorrent.qBittorrent Locking.password

3. Start qBittorrent again