While the "UpdateGenerator.ini" file is automatically changed according to the latest selections that you made in the download GUI, the corresponding "UpdateInstaller.ini" file is not: The file remains unchanged regardless of which options you specify in the updater GUI. However, if you manually edit "UpdateInstaller.ini" and then run the updater, it will set the GUI options according to the file settings.
I suspect that "UpdateInstaller.ini" is supposed to be automatically updated from the GUI settings (just like "UpdateGenerator.ini" is), so that the current behavior is a bug. True?