You may have noticed, with the release of Surfer 16, the ColorScales folder in the Surfer installation directory has been removed. The one CLR file, Rainbow.clr, is copied to the Samples folder in the installation directory for your use.
If you want the older ColorScales folder, with all the additional CLR files, you can download the attached ColorScales.zip file. Just unzip the file and extract the folder to wherever you want the CLR files to be.
Updated September 28, 2018