missed this one too

scene.add_keying_set() --> scene.keying_sets.new()
also removed the use_ prefix since argument names, since this is mainly for properties.

release/scripts/ui/properties_scene.py

@@ -238,7 +238,7 @@ class ANIM_OT_keying_set_export(bpy.types.Operator):
 
         # Add KeyingSet and set general settings
         f.write("# Keying Set Level declarations\n")
-        f.write("ks= scene.add_keying_set(name=\"%s\")\n" % ks.name)
+        f.write("ks= scene.keying_sets.new(name=\"%s\")\n" % ks.name)
 
         if not ks.is_path_absolute:
             f.write("ks.is_path_absolute = False\n")