DHS viewer in explorer no longer working

Hi,
The DHS active X viewer is not working. Is there a way of manually re-registering it somehow? I've tried uninstall/reinstall of HS 7.13.05, but it doesn't work (neither in Windows Explorer, nor Directory Opus). Windows Explorer Folder options >   "Never show icons, always thumbnails" is set on.
  
 
Please provide this additional data: 
Exact HyperSnap version in use (from Help/About menu): 7.13.05
Windows version in use: Win 7 X64