In Operations documentation:
https://doc.qt.io/qtinstallerframework/operations.html

• "aValue" parameter is wrong. The correct one is "value".
  Code: settingsoperation.cpp

  bool SettingsOperation::checkArguments()
  {
    const QString path = argumentKeyValue(QLatin1String("path"));
    const QString method = argumentKeyValue(QLatin1String("method"));
    const QString key = argumentKeyValue(QLatin1String("key"));
    const QString aValue = argumentKeyValue(QLatin1String("value"));
    ...
    ...
  }
  

  Code: settingsoperation.cpp

  bool SettingsOperation::performOperation()
  {
    if (!checkArguments())
      return false;
    const QString path = argumentKeyValue(QLatin1String("path"));
    const QString method = argumentKeyValue(QLatin1String("method"));
    const QString key = argumentKeyValue(QLatin1String("key"));
    const QString aValue = argumentKeyValue(QLatin1String("value"));
    ...
    ...
  }
  

  Proposed change in: `operations.qdoc`

  \row
   \li Settings
   \li "Settings" \c path \c method \c key \c value
   \li Sets or removes the value \c value of \c key in the settings file
   or registry located at \c path, depending on the value of
   \c method: \c set, \c remove, \c add_array_value, and \c remove_array_value.

Note: Documentation indicates that using the Settings operation it is possible to write a "registry". Does it means windows registry? I tried but never was able to do it. Instead, creates a folder HKEY_CURRENT_USER\Software\...
According to the code in: settingsoperation.cpp

  QSettingsWrapper settings(path, QSettingsWrapper::IniFormat);

Does this force to write only in files? If yes, maybe documentation could be modified; It is error prone.