Ok...First of all, get rid of all those folders in your presets.... (DONT DELETE) (Just go Edit > Cut) Go on your desktop, make a new folder. Open Photoshop, click the brush tool, then the brush dropdown menu... Click the arrow, then click " Load brushes " Select that folder, and press ok A message should come up, Click Append Now all your brushes are in that dropdown, not on that list.
***Update*** Now a preveiw on the first post! Or, here Those are not all the brushes, just some of them...