**Describe the bug** The configuration file which holds the hashed & plaintext WiFi has insecure permissions by default. **To Reproduce** on Linux: ``` $ ls -l "$HOME/.config/Raspberry Pi/Imager.conf" -rw-rw-r--. 1 ricardo ricardo 775 Nov 19 12:13 Imager.conf $ grep Password "$HOME/.config/Raspberry Pi/Imager.conf" sshUserPassword=$5$xxx wifiPassword=xxx ``` **Expected behaviour** 0600 permissions.