To be sure that I have understood you correctly may I please ask, what do you mean by the Python Script window?

Are you using Poser 8?
Poser 8 includes Wardrobe Wizard 2

If you click the Poser menu Window > Python scripts do you get a pop up window appearing containing ten buttons?

Is the first button noted as "Wardrobe Wizard"?

If so and you click on it does the button list change so that the first button now says "Convert..."?

If you click on the Convert button does the main Wardrobe Wizard window appear?

Does V4 & V41 appear in the two scrollable lists labeled "Convert from" and "Convert to"?
The lists are arranged alphabetically.

You may need to close then restart Poser for it to recognize new files.

If V4, V41 does not appear it will indicate that you have not installed the files correctly. The files are supplied in a zip archive. The instructions that came with the download indicated that the extracted files should be placed in the folder Poser 8:Runtime:Python:poserScripts:PhilC:Wardrobe Wizard P8:data

A video overview of how to use Wardrobe Wizard may be found at:-
http://www.philc.net/WW2_plugin_overview.php

Full instructions are in the Poser manual.

Thanks.