Update the Flash Builder mobile app to use 64-bit with Air SDK 18.0

I'm having a terrible time updating my Flex project to use 64bit and iOS 8. I have to update because when I use Adobe Air SDK 14 I get the following error when downloading my release version via Application Loader.

I followed all the instructions listed below, but nothing seems to work:

http://easynativeextensions.com/making-your-ios-apps-universal/

https://helpx.adobe.com/flash-builder/kb/overlay-air-sdk-flash-builder.html

https://helpx.adobe.com/x-productkb/multi/how-overlay-air-sdk-flex-sdk.html

When I change the line in myx mxl descriptor file to:

<application xmlns="http://ns.adobe.com/air/application/18.0">

      

        
        
        
      

    

I am getting the following error:

I downloaded the Air SDK from this page: http://www.adobe.com/devnet/air/air-sdk-download.html

I've tried using both the master link and the Flex specific SDK link.

Then I installed the Air SDK in / Applications / Adobe Flash Builder 4.7 / eclipse / plugins / com.adobe.flash.compiler_4.7.0.349722

Also, I used the Apache Flex SDK installer to get the latest flex SDK to be used with Air SDK 18.

He seems to have set a lovely

As you can see, I have tried several versions. I also select the air version in my Flex Project compiler.

I even tried to overlay the SDK into the Flash Builder SDK folder.

However, I always get an error when I try to set my application XML descriptor string to 18.0

<application xmlns="http://ns.adobe.com/air/application/18.0">

      

        
        
        
      

    

I can set it to 16.0 and the app builds.

<application xmlns="http://ns.adobe.com/air/application/16.0">

      

        
        
        
      

    

But then when I create my application has a ton of UI issues. Fidget spinners go crazy and tab bars, buttons and layout have issues. My application looks like this:

For this:

I have no idea what to do.