title: PyQt5: How to install/run Qt Designer
body: <p>Feeling really stupid, right now, but the title says it all:</p>
  
  <p><strong>How</strong> do you start the QtDesigner?</p>
  
  <p>I've installed <code>PyQt5</code> via <code>pip</code> and I believe to have identified the directory it's been installed in as</p>
  
  <pre><code>C:\Users\%username%\AppData\Local\Programs\Python\Python36\Lib\site-packages\PyQt5
  </code></pre>
  
  <p>Now what? There are a lot of .pyd files, some .dll's, too, but nothing executable (well, except a <code>QtWebEngineProcess.exe</code> in <code>...\site-packages\PyQt5\Qt\bin</code>, but that doesn't sound like what I'm looking for.</p>