title: VSTO appSettings of Word AddIn cannot be changed after using MSI installer (generated through Wix)
body: <p>I have a Word AddIn which uses one setting to retrieve information from a webservice. This setting is stored in de settings section of the project (see image)</p>
  
  <p><a href="https://i.stack.imgur.com/Lq7gF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Lq7gF.png" alt="enter image description here"></a></p>
  
  <p>To be able to change this setting after the application is compiled, the access modifier is set to <em>public</em>. When I compile the application and use it in Word, I only have to change the <strong>ConfigURL</strong> in de [applicaitonname].dll.config. This works perfectly, the new URL is applied when trying to retrieve information from another webserivce address (URL).</p>
  
  <p>In this project, I also have a Wix project to create an MSI for this AddIn. Now when I use the MSI to install the AddIn on a computer and after the installation, I change the <strong>ConfigURL</strong>, the new value is not applied, it still uses the value which was set when creating the MSI. </p>
  
  <p>does anyone know if it is possible to create an MSI for deployment, and still able to change settings values in the config file after installation?</p>