Go to the AOL website and look for a link to download the new AOL Desktop for Mac. That page will give you the option of downloading v10.3.7 - note, it's no longer supported by aol.
It appears to me that your aol contacts (address book) are in both places. I say this because if I sign in to aol as a guest on another computer, I can access my contacts list. You can download & install aol communicator to extract your address book. It also has a feature that helps you...