I'm running Win 10 and when using File Explorer, thumbnails for my jpeg2000 - with the .jp2 extension are not being displayed. I'm not sure if this further complicates things, but these images were originally taken on a Phase One P20 back which saves its RAW files in the TIFF format. No other form of file-type is offered. My converted .jp2 files are 24-bit, and I'm saving them this way instead of a 'normal' jpeg because this generates Lossless images. I'm guessing the required 'code' to display these images, isn't normally supplied with Win 10?