Shell Extension component within Foxit PDF Editor/Reader enables you to see a preview of the current PDF view, thumbnails of PDF files in windows File Explorer and preview a PDF attachment in Microsoft Outlook 2007 above.
By default, the Shell Extension got installed with the main program. You could find this component in the "Shell Extensions" folder within Foxit PDF Editor/Reader main installation folder,somewhere like:
C:\Program Files (x86)\Foxit Software\Foxit PDF Editor\Shell Extensions
C:\Program Files (x86)\Foxit Software\Foxit PDF Reader\Shell Extensions