WPWordConverter 2019.10.30 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software is included in Productivity Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free software for Mac OS X is an intellectual property of Edward Mendelson.
From the developer:
WPWordConverter is designed to help you convert WordPerfect documents into DOCX, DOC, and PDF format files. Its method is to use the open-source libwpd WordPerfect import filter to convert a WP file into Open Document (odt) format, and then uses either Word or LibreOffice to convert from Open Document to DOCX, DOC, or PDF format. Depending on the original document, you may get better results with Word or with LibreOffice.
You may want to check out more Mac applications, such as 3dissue, Blurb Tally or Pads X, which might be related to WPWordConverter.