M510 Mouse: Connected by Unifying Receiver. Forward/ Back button was working fine until apparently an automatic update to Logi Options+ caused the forward/ buttons to not work at all. Software shows the buttons are assigned properly. I don't see an option to reset to default in the software. I will try: *Turn the mouse off, pull receive, reconnect everything . *Restart the computer. *Reinstall Logi Options+ *If that does not work??