Window Washer backup plugin only works with Backup4all.

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If you already have Backup4all, you can add the Window Washer backup plugin below.

Download plugin as XML file
This is another product developed by Webroot, and it lets users erase browser history, clean free space, shred files and protect critical computer files. The plugin will allow defining a backup job in Backup4all to save Window Washer configurations and registry keys.

Raw Plugin (XML) Code: Window-Washer.xml

<?xml version="1.0" encoding="UTF-8"?>
<b4asource version="1.0">
  <!--Program unique ID (GUID)-->
  <!--Program name-->
  <name>Window Washer</name>
  <!--Executable file path-->
  <exepath type="0"/>
  <!--Minimum and maximum versions for which the backup was tested-->
  <!--Information about the plugin author-->
  <!--Variables used in the XML file-->
    <!--If type="reg" then the value will be read from the registry-->
    <variable name="path" type="reg">HKEY_CURRENT_USER\Software\Webroot\Window Washer\Paths\KEEP</variable>
  <!--The backup sources-->
    <source name="Washer files" type="folder">
    <source name="Registry" type="registry">
      <registry path="HKEY_CURRENT_USER\Software\Webroot" recursive="true"/>
      <registry path="HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\WWDISP.EXE" recursive="true"/>
      <registry path="HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Window Washer" recursive="true"/>
      <registry path="HKEY_USERS\S-1-5-21-57989841-884357618-725345543-500\Software\Webroot\Window Washer" recursive="true"/>