Changing Main-app.xml namespace for newer AS3/AIR SDK


In a pure AS3 project with the Main-app xml namespace set for AIR 3.8, I'm trying out a newer AIR AS3 compiler: AIR 3.9.

The original namespace is:


If I change the SDK config to the new 3.9 correct version and then try to change this in the above namespace, I get a red highlighting for

and an error: URI is not registered.

Can you tell me the steps to take to change the namespace to the new, correct one for the AIR SDK 3.9, without an error?

Thank you for your help.

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