Same exact thing happened to me. All of a sudden my TI could not be found. I've switched USB cables, Ive reinstalled the software about 5 times. Uninstalled it 5 times. Reinstalled Logic Pro. I've been working this problem for months. I'm now sitting on a $2,000 bricked synth. Who knew Access would eventually abandon the TI. Access should open source the software control and let someone else take over.