I have 2 identical Dell PCs. Flow used to work on both machines. The HD died on machine #2. Replaced it by a SSD and re-installed win10 from scratch. My MX3 and my MX keys are both paired properly, on machine 1 with channel 1 and machine 2 channel 2. On machine 2 (clean install), Options sees machine 1. On machine 2, Options+ does not find machine 2, I have rebooted both computers, tried multiple times, did a factory reset on my devices (from options), still nothing.