I have followed the steps here and have the issues still. I am using Design Extender 1.0.6 and I still get the WA_localURLToFilePath is not defined error.
As mentioned I have renamed my old configuration folder and re-installed the extensions.
This error appears when trying to run CSS Sculptor for me.
The latest version I see for DE is 1.0.6. Is this the version that was supposed to fix this issue?
I figured since the gentleman that started this thread had the same issue i would post it here instead of starting a new thread .