Changes
typo
<check type="uninstall" condition="versionequalto" path="PDF-Viewer" value="2.0.41.1"/>
<install cmd='"%SOFTWARE%\PDFXVwer.exe" /VERYSILENT /NORESTART' />
<upgrade cmd='"%SOFTWARE%\PDFXVwer.exe" /VERYSILENT /NORESTART' />
<uninstall cmd='"%PROGRAMFILES%\Tracker Software\PDF-XChange Viewer\unins000.exe" /VERYSILENT' />