Deactivating WP Font Face

I need to deactivate WP font face and go with anther font plugin. When I do will it automatically remove any CSS changes made? Do I have to manually change anything to get back to square one? I installed this a while back and do not remember what I did to set it up so am not sure how to undo it.

Thanks
Sue

https://www.ads-software.com/plugins/wp-font-face/