the update to 4.12 has reset the reference location for all the skin gen tools to (C:\Users\public\Documents)
I use the Windows 10 function to assign the documents folder to a separate D drive Which uses (D:\Documents ) as it's reference

CC4 was able to find all files located on the (D;\Documents location until the update to 4.12. Now every time I apply anything from makeup or skingen, I get a failed to load error and a search box popup. This occurs not just the first time an element is applied but every time its applied. So the reassignment is not registered at all
(See the attached screen shot)
I have looked through the preferences and there is nothing there to set the correct reference location. It looks like the reference to (C:\Users\public\Documents) is hard coded

This isnt the first time an update has screwed up file references, it happened with the upgrade from CC3 to CC4 which got corrected

Using a separate drive as a documents location is a legitimate Windows function, and CC4 recognised it before the update to 4.12 so this is clearly a bug.