I'm not sure I understand what you're saying. If you click on the Browse button from that menu, it will show you the exact folder where any auto-saved projects will be stored. You can also select all the text to the left (showing the folder location) then copy it and paste it into the location box near the top of File Explorer to browse that folder directly.
None of this will help if the option to use Auto saves was disabled, though.
You also don't say how or why you think you have a "broken" PDS file. Maybe sharing more details about any error messages you've received will help.