If you download new wallet and have a synchronization problem
(or your wallet just refuse to connect to net) - try to add this nodes:
88.86.186.158
71.252.137.245
52.29.77.129
5.9.42.103
I've been having problems syncing for days, how do I add nodes.
Open your wallet, go to: help--debug window--console.
In console type:
addnode 88.86.186.158 add
addnode 71.252.137.245 add
addnode 52.29.77.129 add
addnode 5.9.42.103 add
If something wrong, next strokes will be red color.
If ok - next stroke will be blue
