How to update version cod4x

can someone help how to update verison cod4x im can’t play on any servers btw im on 19,3

download, replace files in …/activision with files from the archive

Or the easy way.

http://cod4master.cod4x.ovh/updatehlp

where im gonna to replace?

Into the game

maded this helped
its updated to 21.1

now there will be an auto-update

its very helpful thank you