ZBrushCentral

When using import from Alpha or Tex. palette thumbnails stopped showing

Hi I used to be able to use the import button in the texture or alpha pallet , and then I would open a folder on my PC desk top where I had PNG files. I have my folder set to display large icons, so I would always see thumbnails of the images in the folder. All of a sudden I no longer see the thumbnails inside of a folder, this only happens when using Zbrush, so it appears not to be a Windows issue. Interestingly I do see the thumbnails of images that are on my desktop but not in any sub folders, also if I use the Preferences use Z folders ( which I do not want to keep activated) I do see thumbnails in subfolders located there. So I am baffeled with this sudden change of Zbrushes behavior. Also I whish Light box would show PNG thumbnails but it seems to only show PSD files ? If you have any clues Pleas Help! Thanks