Sounds to me like the download was corrupted.. not to worry as Artrage 3 and higher now include that palette within the application folder.
As you're working with version 3.5 you'll need to open your colour palette and from its menu choose 'import new global colour sample set' then browse to:-
Program Files (x86)>Ambient Design>Artrage Studio Pro>Resouces>Colors and you'll find Oil Spectrum.col in there
The import 'global' option will make this palette available to all paintings you do. The import 'local' option will make the palette available only to the current painting that you are working on.
Hope this helps
Last edited by Juz; 07-29-2011 at 07:05 PM.
"I paint because I love to cut mats" (Arthur Alexander)