Update usage.md

readme/usage.md

@@ -14,8 +14,7 @@ Hitting a key on the device that is selected in the large dropdown on the top
 should display the key on the bottom of the window, and write it into the selected
 row (as shown in the screenshots).
 
-For changes to take effect, save the preset first. Otherwise, the daemon
-won't be able to know about your changes. Afterwards press the "Apply" button.
+Changes are saved automatically. Afterwards press the "Apply" button.
 
 To change the mapping, you need to use the "Restore Defaults" button, so that
 the application can read the original keycode. It would otherwise be