There is a Kerkythea update on its way, in the meantime you need to paste&replace this file :
http://download.getskatter.com/su2kt.rb
in
C:\Users\USERNAME\AppData\Roaming\SketchUp\SketchUp 201X\SketchUp\Plugins
for every Sketchup version in which you plan to use the KT+Skatter combo.