uni_extractor.xml

<?xml version="1.0" encoding="UTF-8"?>
<packages:packages xmlns:packages="http://www.wpkg.org/packages">

  <package id="uni_extractor" name="Universal Extractor" revision="%version%.1" priority="50" reboot="false">
  <variable name="version" value="1.6.1" />
  <variable name="fileversion" value="161" />

  <check type="uninstall" path="Universal Extractor %version%" condition="exists" />

  <install cmd='%WPKGSOFTWARE%\universal_extractor\uniextract%fileversion%.exe /sp- /verysilent /suppressmsgboxes /norestart' />

  <upgrade include='remove' />
  <upgrade include='install' />

  <remove cmd='"%programfiles(x86)%\Universal Extractor\unins000.exe"  /VERYSILENT /suppressmsgboxes /norestart'>
    <exit code="-1"/>
  </remove>

  </package>
</packages:packages>