Yep, I needs me some ross-tech so bad for my Allroad. I need to do a reverse 402 mod to make it sit at level 3 all the time in winter. Well, at least up until 90 mph or so at least. Do you still have your Ross tech?
Have you tried taking it outside with the side cover removed and blowing it out with compressed air? Mine gets filthy inside and I do this about twice a year. Dust inside can cause shorting and heat problems.
Still have it in my laptop but I bought it about 5 years ago and haven't done any updates yet. Not sure if it needs to be updated to work though.