title: Vagrant provider stuck to VMWare Workstation
body: <p>After trying to use the VMWare Workstation providers for vagrant (which I now know requires a license), and switching back to VirtualBox, I have this problem :</p>
  
  <pre><code>$ ~/Homestead &gt; vagrant up --provider=virtualbox
  A valid license is required to run the Vagrant VMware
  provider. Please visit http://www.vagrantup.com to purchase
  a license. Once you purchase a license, you can install it
  using `vagrant plugin license`.
  
  Vagrant failed to initialize at a very early stage:
  The plugins failed to load properly. The error message given is
  shown below.
  
  exit
  </code></pre>
  
  <p>I also tried exporting a default provider through <code>VAGRANT_DEFAULT_PROVIDER</code>, but to no avail.</p>