I'm a bit of a noob, so perhaps this is a stupid question, but is anybody else having trouble building formats other than VST or AU? I've had no troubles building VSTs on my PC (Windows 10) and Audio Units on my Mac, but the compiler (Visual Studio 2015) simply does not build an AAX plugin at all. VST3 is the most confusing of all though. I find that if I choose to build DEBUG Win32, it will create a file with the extension VST3, but this is not an actual VST3 file. It is just a copy of the VST DLL but with the file extension changed so that the file is unusable. I tried building the audio plugin demo that comes with JUCE and it too built an unusable VST3 file in the exact same manner.
I can't figure out what I'm doing wrong. I installed the AAX SDK and I built the library files.