Supported Versions: Photoshop CC 2017 (It is no longer support CC and CC 2014.)
Upload IconResources.idx, PSIconsHighRes.dat and PSIconsLowRes.dat. And download exttracted resources. (No PSIconsXHighRes.dat and PSIconsXLowRes.dat)
C:\Program Files\Adobe\Adobe Photoshop CC 2017\Resources
/Applications/Adobe Photoshop CC 2017/Adobe Photoshop CC 2017.app/Contents/Resources
Upload a zip file (contains High/Low folders and IconResources.idx). And download packed resources.
Back up the original files before overwriting them :)