Well, 3.70 didn't have much of a life. Interesting that there are separate versions for the 245 and 245M. Was that always the case? 3.52 and 3.70 caused me problems with random reboots and sensors not working properly. Any clue if this will fix any of that? Specifically, the Body Battery would flat-line after 5-7 days and would not come back. Sometimes finishing an activity would cause the watch to crash and reboot.