title: Only keep this String in Notepad++ (Regex)
body: <p>I have again a Problem.<br>
  Have a list like</p>
  
  <pre><code>Ham$$Keepit=Keepit€ That was just Awesome #+üä!
  Ber$$Dontremove=dontReMove€ delicious
  </code></pre>
  
  <p>Want to keep only between the $$ and €.<br>
  So the result should be </p>
  
  <pre><code>Keepit=Keepit
  Dontremove=dontReMove
  </code></pre>
  
  <p><strong>Thanks for your help again !</strong></p>