Updater vs. native installer?

Can anyone clarify this for me:

http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/desktop/Updater.html

The Updater class is only supported in the desktop profile. It is not supported for extended desktop applications (applications installed with a native installer)... Extended desktop application (applications installed with a native installer) can download a new version of the native installer and launch it using the File.openWithDefaultApplication() method.

First, is the "native installer" referring to when you choose the "Output as: Windows intaller" in the AIR settings?

Second, does this mean an AIR app installed from a .exe can't install updates using a .air file? Or is this simply saying you can't use the Updater class to install an update from a .exe file? In other words, is this doable:

1. Create an AIR app and output as Windows installer

2. User the Updater class to install an update using a .air file

-Aaron