Each product on Adobe Exchange may have a different install location. Now in the Notes section of the Panel we have an area where the producer can tell you where the product can be found after installation. As I am not sure which product you are referring to it's not possible for me to say where the brishes can be foudn as I am not sure if they are for Illustrator or Photoshop. Please check the Notes section and it should say but if not please let me know and I will get it corrected.
Jonathan Ferman | Product Manager