Thumbnails not showing up in Solidworks Explorer?

Hello;

           While I used to get thumbnails going through SolidWorks  Explorer, now it seems I just get a description of what type of file I'm looking at. I wondering if a

setting has changed or something. I used to be able to go through all the files, & see what they were quite quickly in SW explorer.

Thanks in advance for any input;

Rob_D SW 2017 S04.1

SolidworksSolidworks Explorer