Simply upload your config file to the page and it will generate a form for the given config file.
Once you are done modifying the form on the webpage you can then click the button at the bottom of the page to compare your changes to the original config file.
When the page is done comparing your changes, it will save/download a new config file to your device.
Replace your original config file with this new one to use it in game!
You can also try following along the steps here to use the WebConfig file that you can generate from this mod.
If you have any ideas on how to make this mod better please feel free to reach out!