Download here and place it into your Fusion\Skins directory. Then go to Preferences -> Global -> Appearance and move "Fresh14" from the left list to the right one (below the Fusion 6.1 entry that is already there).
Credits for the icons: http://www.icons8.com
My skin doesn't override everything, so it needs to be applied on top of Fusion 6.1... If you're using other additional skins, things might get random
Changes in the latest update:
- replaces toolbar icons (new/copy/paste... those ones)
- icons for file requester dialog