Can you explain exactly what file you wrote that an update or new version install of Photoshop deleted from your machine. Photoshop updates and installs should not delete any of your files. Your files should still be on your system where your wrote them.
If you install third Party Plug-ins into Photoshop and you install a new version of Photoshop you will need to install the Plug-ins into the new Photoshop version installed. Adobe Installer do not migrate third Party add ons.