USB Creator appends duplicate network settings from zip backup

When using the Unraid USB Creator tool to restore from a zip backup, I was required to re-enter network information (IP address, netmask, etc.). Upon inspecting the resulting network.cfg on the new USB key, I found that the values I entered were appended to the existing values from the backup rather than replacing them.

This caused invalid network configuration such as:

IPADDR="192.168.1.3""192.168.1.3"
NETMASK="255.255.255.0""255.255.255.0"

and

DNS_SERVER1="192.168.1.1"
DNS_SERVER1="192.168.1.1"

As a result, the system did not receive a valid IP address on boot, and I had to manually correct the network.cfg file.

Steps to Reproduce:

1. Use the Unraid USB Creator tool.

2. Select the "custom" option to restore from zip backup

3. Provide custom static network configuration.

4. Flash the new USB key and inspect config/network.cfg.

Expected Result:
Network settings from the backup should either:

• Be cleared and replaced by the newly entered settings; or

• Be equivalent to the source zip

Actual Result:
Duplicate values were appended within a line and across lines, producing invalid entries in the config file.

Environment:

• Unraid Version: 7.1.3

• USB Creator Version: 1.0.1

• OS: Windows 11

Suggested Fix:
Ensure the USB Creator properly clears or replaces existing configuration values when applying new network settings during the restore-from-backup process.