The instructions are the same as for v2.0.4 if you are runing older version than v2.0.4
https://forum.cirkus-serveri.com/topic/71/new-cod4x-webadmin-v2-0-4-relase

If you have already upgraded to version v2.0.4 just over write the files, ofc backup config.json file as ussual and restart the application