I never found a way to do this with the v12 SDK, but for v12 there is a workaround involving copying dll:s from the v11 install. I wouldn't be surprised if the workaround works for v13 too.
With the v13 SDK I think it's possible again, however, but since I don't have access to A:M v13, I can't debug the plugin. When I upgrade my A:M licence and find some time, I will continue with this and some other plugins.