Updater doesn't touch pspad.ini It downloads ZIP unpack it go through all unpacked files and backups them copy all u packed files into pspad folder
It doesnt touch files outside pspad folder and doesn't touch files what are not contained in ZIP Configuration backup is made by PSPad, when you confirm any update (visit web or start downloader) -- <https://forum.pspad.com/read.php?6,75559,75614> PSPad freeware editor https://www.pspad.com