It will be difficult nowadays to find some software tool that can still open or import old Pocket Word documents (.psw) or convert them to some other format, for example modern MS Word document, which is what psw to docx conversion actually is. Your best option actually is look for some earlier versions of the free OpenOffice software and use that as originally these were certainly capable of this. As for modern software, the odds for PSW format support are lower with every new version.
Updated: August 11, 2023