Overriding registered rcc file does not update its content

External binary resources are not updated when they are unregistered and registered again. The content stays the same instead of being actualized.

QResource::unregisterResource("redTheme.rcc");
QResource::registerResource("redTheme.rcc");

Both commands return true. However, the content does not change even if the file is overridden. Registering does not seem to have any effect.