title: InstallShield - Prevent registry values to be overwritten by patch during upgrade?
body: <p>I am using InstallShield 2016, on an InstallShield MSI Project, and trying to create a minor patch package, with an Update executable. Everything works well, but registry values change to their default values upon updating. </p>
  
  <p>I have looked into changing the REINSTALLMODE string, but it may be too restricting for future leveraging of the registry key system. I have also read that the use of AppSearch and RegLocator tables to read the values into msi properties. I don't understand how to use these tables so that is a solution I don't quite get.</p>
  
  <p>What am I missing?</p>
  
  <p>Thank you.</p>