Just a heads up, the team are still working on the next Cod4x update, things are taking longer than we anticipated tho.
In the meantime you can stay on 21.1 or update to 21.2 or 21.3
The latest two new patches include some small fixes. In order to install them you may need to create a directory, otherwise you will probably see an error message. To get around this, you can run Command Prompt and enter this
mkdir "%LOCALAPPDATA%\CallofDuty4MW\updates"
We will do our best to improve the update process for future updates, there was a handover of some Cod4x things to ProXicT and these updates can be seen as a test.