In a vestigal sense, AOL still exists at AOL.com. I even have a 3 letter foo@aol.com email address that I check once a quarter or so. Currently 400 messages, 99.9%spam and phishing, 0.1% misdirected addressing.
AOL desktop?
1. Why?
2. Was it working before?
3. What was the last thing you did before it stopped working?