It's just takes some period of time. In my case it's took about 4 days to sync completely.
There is no progress bar though, so it makes me skeptical if its actually downloading.
addnode=209.250.224.106:14158
addnode=104.238.147.194:14158
addnode=45.77.97.34:14158
addnode=45.76.103.242:14158
addnode=151.80.230.151:14158
addnode=35.168.205.60:14158
addnode=45.32.186.58:14158
addnode=207.148.0.162:14158
addnode=52.212.176.123:14158
addnode=82.200.205.30:14158
addnode=185.25.60.199:14158
addnode=73.211.90.130:14158
addnode=212.220.105.27:14158
*For you Windows users, it's at:C:\Users\Your_User_Name\AppData\Roaming\UniversalCurrency\UniversalCurrency.conf