NzeRail

I host a small server for some friends and I have to move part way through the week back and forth between 2 houses with different IP's. Is there a way to change the local IP that the server starts on? I may not be wording this right but when I change the server-ip: line in the server txt file it does not change in the launcher. (eg change 192.0.0.1 to 192.0.0.2, the launcher still says 192.0.0.1) I can sort the port forwarding etc for my friends myself. Any help will be appreciated.