I just fixed mine and works perfectly with the latest version of Logic X as of 10/15/2015. I tried their "solution" and didn't work. I used my older macbook pro with USB 2.0 and went through the process and it updated but then it still wouldn't work on my 2014 iMac with USB 3.0. After more frustrating research I found this video which fixed the issue.
Watch this video.
Tags: Logic, Logic Pro X, faderport, issue, not working, fix, resolved, fixed.