So-- using the IPC-HDW2531T-AS-S2 firmware worked through the interface?? Or did you have to do the TFTP method?I did have to do a factory default after the firmware update to remove the Amcrest logo.
Just keep in mind you'll revert to a static IP that's likely outside of your subnet.
You can use the Dahua config tool to find the camera and change the IP. Dahua Wiki