title: Setting up an existing Heroku application on a new machine
body: <p>I've an existing project that works fine on another machine, but I've just upgraded and from within the project development directory, everytime I run a heroku command I have to post-fix it with --app </p>
  
  <p>I feel like I've missed an application setup stage, but I can't figure out what, as everytime it states:
  Run this command from an app folder or specify which app to use with --app APP.</p>
  
  <p>Help appreciated. </p>