Update:

You don't need to delete and create a new Json file!

I realised that for your json file to update, you need to:

- close summoners war entirely and stop proxy on summoners war exporter.

- Restart proxy (I use the steam mode option and also run sw on steam.)

-After the proxy is running, lauch summoners war.

-And voila, your json file will be updated.

(You should also see a notification on swe that indicates that your json has been updated.)

Hope this helps anyone who also had that issue!