Not specifically LR, but as my DNG photo are all for LR, there may be someone here who knows how to resolve the problem. Windows 10 and LR Lightroom version: 6.14 [ 1149743 ] If I go to a Windows 10 folder - all of the jpeg files with have a thumbnail (as do png, tiff etc) Very few DNG files will have a thumbnail (usually none) I have installed Microsoft raw image Extension .... v3 no difference Have followed the steps to kill thumbnail cache, delete it, and restart explorer ... all jpeg thumbnails rebuild (slowly) but not DNG. Have also followed the tip to uncheck 'always shows icons, never thumbnails'The advice is to click on teh top button 'apply to folders' but I can't do that as that is greyed out. (pic attached)
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