Ping Mr. Corel on CPT thumbnails

Hi Mr. Corel,
   CPT thumbnails in Windows Explorer disappeared when I installed CDGS X7.  I was forced to uninstall X7 and go back to X6. 
   This has been a chronic problem for myself and a few other people.  None of the posted suggestions worked.  Neither are  there any third party applications like Mystic Thumbs which create CPT thumbnails for Windows Explorer.
    Do you have any fixes or suggestions.  I would like to move on to X7.
Phil