SteamCMD is required to continue.
ServX can be installed and kept up-to-date using the following SteamCMD script:
force_install_dir ./servx login your_steam_username app_update 2241750 validate quit
Note: SteamCMD recommends having a separate account to run dedicated servers but the account used to login must have CODEX in its game library.
If you prefer, you can save this snippet to a file such as update_servx.txt then run:
steamcmd.exe +runscript D:\my_server\update_servx.txt
ServX relies on the .Net 6.0 Runtime