title: Can't work custom tools on Zim Desktop
body: <p>I can't figure how to work with custom tools in Zim Desktop</p>
  
  <p>I'm on windows10
  Zim Desktop portable edition 0.65
  Python 2.7 or 3.6, I've tried both</p>
  
  <p>Every time I get this messagge:</p>
  
  <pre><code>%1 non è un programma win32 valido
  </code></pre>
  
  <p>thats for: this isn't a win32 valid program</p>
  
  <p>Someone can help me?</p>