Try these instructions below at the bottom, from the DahuaWiki (ignore their video).
NOTE: The one thing they failed to mention is that you need to run an Ethernet cable directly from your PC to the camera (or PC to POE switch to cam or PC to POE injector to cam) after you change the PC's IP address and make it static, on the same subnet (192.168.1.XXX) as the cam (192.168.1.108). For the PC you can use 192.168.1.20 and subnet mask of 255.255.255.0, no gateway or DNS server entries needed.
How to Modify IP Address of IP Camera / Change IP Camera that is stuck on "192.168.1.108"