Menu Writer 2.0.6 is not compatible with DW CS6.
The extensions that we offer that are compatible with DW CS6 are:
Design Extender - Includes Menu Writer
if you continue to use the stand alone version of menu writer, you will need to continue using the previous version of Dreamweaver.
If you wish to use Menu Writer in DW CS6, you will need to upgrade to Design Extender.