The blurb from ProcessList.com [0] writes:

WDSUPCNV.EXE (Microsoft Word 97 Text Converters) is an executable from the software Supplemental Text Converters for Microsoft Word 97 version 4.71.0 by Microsoft Corporation. WDSUPCNV.EXE version 4.71.0 has a file size of 624,192 bytes, and is most commonly found under the directory "Alexandra" with a creation date of December 20, 2005. 

This version is allegedly 04.97.03.1400, but this has not been checked.

[0] http://processlist.com/info/wdsupcnv.html