I've made sure they are compatible with the desired program (as opposed to only being useful to adobe sketch, etc), but I still cant access. Help please!!
I have a feeling you may be looking for them in the wrong place. When you open an artboard in Illustratror or Photoshop CC, you should see the brushes in the Libraries panel. I've attached an image (ignore the fact that my brushes are all greyed-out; they're saved for Sketch) that shows where to look for them. Is it the same place you're trying to access them?
Let me know.