I have had the same exact problem, I have fixed it. You need to get older SDK (I have used 4.5.0) and replace one file from it to the new SDK (Ideally 9.2.0) "Application.desc" from \NintendoSDK\Resources\SpecFiles
No, I have not. I found the authoring tools but I don't know how to decrypt it nor encrypt with retail keys, could you please point me in the right direction?