Q: How to set up File Exchange Authorization Tokens instead of the File Exchange Chrome Extension?
A: Yes, you can change to this option at anytime, it does not require additional payment. One recommendation would be using Remote Chrome with it (which is optional), just so that Sku Grid has a private, dedicated IP address to send and receive your data.
Here's more information on File Exchange via Auth Token --> How to Set Up Sku Grid to Reprice eBay Items Without API Access or Chrome Extension Using File Exchange Authentication Tokens
So you can just remove your chrome extension from your browser and change to this method if you prefer.