title: install4j default options on update installation in welcome screen
body: <p>In install4j welcome screen, if there is a previous installation, the welcome screen may be like below:</p>
  
  <p>The default choice is "Yes, update the existing installation" on the welcome screen.</p>
  
  <p>Is it possible to make "No, install into a different directory" as default choice when launching welcome screen?</p>
  
  <p>Since I have no enough reputation, I can not attach a picture here.</p>