Many thanks for your reply. But the issue still existed in my side.I think the bug is not fixed completely.
Two desktops and two mobiles are in one LAN network. Two mobile phone,one is android 4.1.1 and the other is android 4.2.2. I pair these two mobiles with my win7 desktop,but in the sync tab of mobiles,it always prompt 0 device online. I try to use BTsync in two desktops,it works well. And also i use send function with two mobiles,it works well too. The problem is the connection between mobile and desktop.It can't find each other. Any body can help me? Many thanks!