There seems to be a deadlock of some kind in the network code .. can you let it run for an hour or so ..
I remember people reporting that after a while they synced up again ..
Alternatively you can try to connect to the seednodes manually:
"178.62.50.61:1776",
"178.62.50.61:1777",
"178.62.50.61:1778",
"80.240.133.79:1776",
"80.240.133.79:1777",
"5.101.106.138:1777",
"5.101.106.138:1778",
"128.199.137.122:1776",
"128.199.137.122:1777",
"95.85.33.16:8764",
"180.153.142.120:1777",
"84.238.140.192:42577",
"5.101.106.138:1776",
"61.129.33.213:1776",
"80.240.133.79:1778",
"89.187.144.203:8764",
"104.131.35.149:1776",
"178.62.50.61:1779",
"178.62.157.161:1776",
"188.226.195.137:60696",
"auseednode.minebitshares.com:1776",
"euseednode.minebitshares.com:1776"
in the console type:
network_add_node <IP>