We are looking into this problem. Are you getting an error while converting from PDF to docx (no docx created?), or the file content in docx file after exporting from PDF is incorrect? Please elaborate on the exact issue you are facing.
Also, please share the version of Reader/Acrobat you are using. You will find the version number under Help→Adobe Adobe Acrobat…
Can you please elaborate a bit more about the issue you're facing? It will be great if you could share a screenshot with us.