For what it's worth I managed to recover some pz3 files (going back to 2015 when I bought the present Mac) using TechToolPro9. Previous attempts with File Salvage failed because though it could recover both pz3 files and pmd files (which I no longer use) it didn't match them up; just numbered them - which in most cases meant th pz3s were no use. TechTool recovered the pz3 files with their original names. I have yet to see what it can do if I ask for pmd files as well ... There might be something out there like TechTool suitable for Windows machines.