Jpg showing as thumbnail?

Hi... maybe I've got a setting wrong in FRV somewhere but last week I changed the picture control settings on my Nikon to Monochrome to experiment with learning to see images in black and white. I shoot raw so this setting only changes the jpg preview file that displays on the camera's LCD screen, the raw file captures and retains all the colour information. However, upon viewing in FRV, the thumbnails on grid view are all in black and white. (Note that when I view the image in full size, it is in colour). Is there a way to have the thumbnail display in colour?