Issue creating 64 bit ANE for OS X after AIR 20.0 release

Hello,

I am trying to make a native extension for an app so it can release it on the OS X app store.

I had a working native extension working when using air 19.0 (when it was 32 bit) but have been unable to update and get it working since the AIR 20.0 release.

So far despite trying numerous solutions have been unable to get a native native extension working with AIR 20.0.

Trying to get a very simple app working with an ANE that has 1 function in it "getNumber".

Whenever I try to debug, I alway get the following error:
"Error #3500: The extension context does not have a method with the name getNumber."

If I create a release build and run it I still get "Error #3500"

I tried the steps mentioned here Re: Mac 64-bit development build discussion‌ extracting the ane and running the command in termial but I get the following error

"invalid application descriptor: Unknown namespace: http://ns.adobe.com/air/application/20.0"

Here are links test projects I am using:

Test app project for flash builder: https://s3.amazonaws.com/aneprojects/Test64ANE.fxp

ActionScript library used to create the ane: https://s3.amazonaws.com/aneprojects/test64ANELib.fxpl

xCode project (with "Adobe AIR.framework removed" to make it smaller) https://s3.amazonaws.com/aneprojects/test64extension.zip

!

Thanks