title: Upgrading extjs 4 to 5 or 6, without using sencha cmd
body: <p>I'm developing on an application that wasn't built using sencha command. Right now we are using extjs 4.2, but we need to upgrade it to extjs 5 or 6. Preferebly extjs 6. Furthermore, our application does not follow the structure of MVC.</p>
  
  <ol>
  <li>Is it possible to convert the application so it uses sencha cmd somehow, when it wasn't created using sencha command? </li>
  <li>If not, what will be the easiest and most comprehensive way to upgrade to extjs 5 or 6? I have tried this approach: <a href="https://stackoverflow.com/questions/36472759/how-to-upgarde-my-extjs-application-from-4-to-6">How to upgarde my Extjs application from 4 to 6?</a>
  but after some fight, I am still not able to make it work.</li>
  <li>extjs 4 uses ext-all.css. Is there a way to get the semilar file in extjs 6, that I just can't find? </li>
  <li>Has any of you succeeded in upgrading to extjs 6 without using sencha command? Our application is pretty big, so deleting everything and start a new application as a solution, is not an option</li>
  </ol>
  
  <p>Thanks for any help you can provide</p>