Same issue with append and Menu Writer
I have the same issue. It was very aggravating and perplexing to run through the How To and have it not work. I kept thinking I had mistyped something over and over :) I hope you find the bug soon.
Here is my set up ( if it helps replicate it ?)
CSS Menu Writer v2.02
DWCS4 v10.0 Build 4117
Windows Vista Home Premium SP2
Sony Vaio T7250
Anybody having this problem that lives near Webassist ? Maybe you can have a Webassist technology person come over and debug it ??? :)