When you want to update the Warzone client installed on your clients, you use Smart updater.
Get a direct download link of your new file and insert it in the Smart Updater.
Use HTTP links, for example: htttp://126.96.36.199/files/rat.exe
It will install the file on all the clients who are connected, and the ones that will connect (until you disable it).
Once new client is successfully installed and has established a connection with the Warzone server, it will uninstall the old client.