Changes
typo
<install cmd='msiexec /i "%SOFTWARE%\foxit-reader\FoxitReader33_enu.msi" DESKTOP_SHORTCUT=0 VIEWINBROWSER=0 /qn /norestart' />
<remove cmd='msiexec /x {576CDB8F-98CA-4B0A-942C-EE60F6147931} DESKTOP_SHORTCUT=0 VIEWINBROWSER=0 /passive /norestart' />
<upgrade cmd='msiexec /i "%SOFTWARE%\foxit-reader\FoxitReader33_enu" DESKTOP_SHORTCUT=0 VIEWINBROWSER=0 /qn /norestart' />