Copy the folder "Render Support"
to a known location

In Revit click on the application menu (big "R")
click on [Options] button (next to Exit button)
Click on "Rendering" in the left pane
under Additional Render Apperance Paths click the plus sign "+"
In the newly added row click the elipses button [...]
Browse to the "Render Support" folder you saved earlier
Click "Open"
Click "OK"