Really glad I checked here 6 months after downloading and updating to 5.6.6; about to plug into a racecar this weekend and do not want this to happen. That would have made my day.
I install as updates come out so I always have a version to connect to clients cars that don't come from me. I never saw any email saying to not use it, or did I get one and only had a man look...?
Luckily I checked the Downloads page against my version to see if I had latest, was wondering why I'd have a newer one... and then found this thread. Not cool.