I am having the same issue. I tried using the given code and then I can no longer load any program onto my micro, and the comm port will start dropping out and is no longer recognized. I found that if you reload a sample code( I used "blink") that it seems to fix the controller. It takes a few tries though. You have to press the hard reset button on the micro while the code is compiling, but before it uploads and hope for the best. The link below is what helped me with this.