MIXAMO RIG CONTROLS ADD ON FOR BLENDER 2.9 DOES NOT ALLOW TO EDIT WEIGHTS - URGENT HELP !!

MIXAMO RIG CONTROLS ADD ON FOR BLENDER 2.9 DOES NOT ALLOW TO EDIT WEIGHTS - HOW TO DO IT? BONES BECOME CONTROLS AUTIMATICALLY WITH THAT ADD ON, SO ONCE IN WEIGHT MODE IS NOT POSSIBLE TO EDIT WEIGTHS FOR MESH OR HOW TO DO IT?  HELP PLEASE !! LOOK IMAGE ATTACHED - THE ADD ON IS THIS ONE: https://www.youtube.com/watch?v=FJJ-PIge5wY&ab_channel=MMasterbrock