title: A Qt spreadsheet app shows stored files like unknown ones
body: <p><a href="https://www.dropbox.com/s/ebv4qvol49rrqd3/SP.rar?dl=0" rel="nofollow noreferrer">Here</a> is the program and below is the screenshot of the issue. </p>
  
  <p>I using Qt Installer Framework (QtIFW2.0.1) created an installer for that Qt app (the spreadsheet). Then installed it on my PC. Now when I create a New File and then save it on the Desktop (Windows 7 x64), the app handles the file but its  shape is like unknown files!   </p>
  
  <p>Here are some samples: </p>
  
  <p><a href="https://i.stack.imgur.com/6rp4x.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6rp4x.png" alt="enter image description here"></a>  </p>
  
  <p>I searched on the web and did these:  </p>
  
  <p>I edited the <em>package.xml</em> file and changed all <code>@component.addOperation</code> to <code>@component.addElevatedOperation</code> in the <code>installscript</code> file.<br>
  There were three <code>operations</code> all for creating shortcuts.</p>
  
  <p>Now I seemingly should add this line of code into the code:</p>
  
  <pre><code>addElevatedOperation("GlobalConfig", "SystemScope", "Company", "App", "key", "value")
  </code></pre>
  
  <p>My question is, is it sufficient to solve the issue? And if so, where in the code, what <code>.h</code> or <code>.cpp</code> file to use it into, please?</p>
  
  <p>If any other file is needed I will pleasantly upload it.  </p>