if something happened and you do not have a working password to log in to Keywin Light, you can erase a settings file to allow you to use the default password 301042.
The file is found in a map that is hidden, make sure to set your computer to show "hidden files and folder". (usually, you can just search on your OS for "hidden files" to find the command)
Once you have the access to see hidden files and folders go to this address:C:\ProgramData\Creone AB\KeyWinLight
Erase the file named settings.kwl
Restart Keywinlight, you can now use the default code 301042.