i've followed this in order to flashbuilder 4.6 to use air sdk 3.4. no problems, or hiccups with the update. the only problem is when i try to debug a mobile project using this sdk, either for android or ios i get the following error:
Process terminated without establishing connection to debugger.
invalid application descriptor: Unknown namespace: http://ns.adobe.com/air/application/3.4
Launch command details: "C:\Program Files (x86)\Adobe\Adobe Flash Builder 4.6\sdks\4.6.1\bin\adl.exe" -runtime "C:\Program Files (x86)\Adobe\Adobe Flash Builder 4.6\sdks\4.6.1\runtimes\air\win" -profile mobileDevice -screensize 640x920:640x960 -XscreenDPI 326 -XversionPlatform IOS "C:\Users\joao\Adobe Flash Builder 4.6\teste34\bin-debug\teste34-app.xml" "C:\Users\joao\Adobe Flash Builder 4.6\teste34\bin-debug"