It’s in a folder called ProgramData/20-20 Technologies/Config – you will have to make the folder visible as it is normally hidden.
You can always use a script I created to do the same thing including save the registry settings – download it here:
https://www.dropbox.com/s/s2co2c4k53nlwwb/V112020SettingsSaver.cmd?dl=0
Save it to your desktop and then double click it and follow the instructions – it creates a folder on the desktop called 2020RESCUE with all the relevant files in. You use the same utility to restore in the event of an issue.
It works well and I have had no issues with it but you use at your own risk.