Previews and thumbnails not showing - CorelDRAW X7

Hi All,

Is anyone else having issues with the thumbnails and previews not showing in X7? I'm using the 64-bit version on Windows 8. No previews show in File Explorer or in the Open/Import windows within the program. A few thumbnails display correctly but very few (maybe 1 in 30) and I can't identify any difference with the files that do display and those that don't.

Any suggestions?