Quassel stores its client configuration information in a configuration directory, the location of which differs based on the operating system that you are using.
On Windows Vista and newer, the client configuration can be found at
On macOS High Sierra, the client configuration file can be found at
~/Library/Preferences/org.quassel-irc.quasselclient.plist and the config directory at
On most Linux distros, the client configuration directory can be found at