@tig said:
Now right-click on each of these new Materials in turn and pick Save_as, and save each of them as new skm file, say into the ../Materials/Wood folder.
Thanks to you I not only got my woods into Wood, but I've also got a Materials dropdown that doesn't overflow and need scrolling, I've got A_Personal_Palette category with the stuff I use all the time and I've got rid of, for example, Colors_Named. A million thanks.