title: Pik on Windows 7 doesn't remember the selection
body: <p>I am using <code>pik</code> on Windows 7. I am unable to make <code>pik</code> to remember the ruby version selection.</p>
  
  <p>Example:</p>
  
  <p><strong>Command Window 1</strong></p>
  
  <pre><code>&gt; pik list
  * 187: ruby 1.8.7 (2011-02-18 patchlevel 334) [i386-mingw32]
    192: ruby 1.9.2p290 (2011-07-09) [i386-mingw32]
    193: ruby 1.9.3p125 (2012-02-16) [i386-mingw32]
  </code></pre>
  
  <p>I select version 193.</p>
  
  <pre><code>&gt;pik 193
  &gt;pik list
    187: ruby 1.8.7 (2011-02-18 patchlevel 334) [i386-mingw32]
    192: ruby 1.9.2p290 (2011-07-09) [i386-mingw32]
  * 193: ruby 1.9.3p125 (2012-02-16) [i386-mingw32]
  </code></pre>
  
  <p>Now I launch another command window:</p>
  
  <p><strong>Command Window 2</strong></p>
  
  <pre><code>&gt; pik list
  * 187: ruby 1.8.7 (2011-02-18 patchlevel 334) [i386-mingw32]
    192: ruby 1.9.2p290 (2011-07-09) [i386-mingw32]
    193: ruby 1.9.3p125 (2012-02-16) [i386-mingw32]
  </code></pre>
  
  <p>In the new window the ruby selection is not remembered. How do I make <code>pik</code> persist the ruby selection across command window sessions?</p>