Hi @fuba182,
Do you mean hiding all the other paid shipping methods, no matter if there are being handled by Flexible Shipping or e.g. by WooCommerce default Flat Rate?
If so, I’m afraid that it’s not a Flexible Shipping default functionality yet, however, in general, the answer is yes, there are two ways it can be solved. The first one is the custom coding and putting the snippet in the functions.php file of your currently used theme/child-theme. Optionally, if you are not into coding, you can also achieve that by using an additional plugin we have in our offer. Unfortunately, this forum is dedicated only to the Flexible Shipping free version and due to its ToS we are not supposed to discuss about the premium plugins here.
If you need some more information on this matter please contact us directly at https://flexibleshipping.com/support/.
Kind regards,
Luke