I just purchased a Forerunner 245 Music yesterday, and when I woke up this morning the screen said something about a software update (8.20) and since then my watch has been completely unresponsive. I have left it on the charger for some time and tried the usual buttons to get it to turn on or reset, but so far nothing has worked. Has anyone experienced anything similar? I was going to call customer service but they are not open today.