How to remove the Pronged Snap Fastentrs?

Easy and simple with the help of a flat screwdriver

Hooked the edge of the button and gently turn the screwdriver axis to the left and to the right until the button will not come off .

In most cases, antennae (crown) buttons are bent parallel to the fabric. Gently the side cutters straighten them and take out the ring - crown buttons.

Recovery Pronged Snap Fastentrs.

 This button is not hard to recover. Using small pliers.  
                       
Get the item suitable for re-installation.

But if the crown part of button broken at least one tooth, then this item is not suitable for installation.