Given you have zero connections, you most likely are in a fork and been banned. Sorry to say, you may have to resync. Close the wallet, delete everything (files and folders) in that same mentioned directory except your walet.dat file, and then start the wallet and allow it to resync. It will require much time. A bootstrap and snapshot option exist and are available at
http://bern.cash/download/Sorry for the inconvenience.
Today I tried to re-install the wallet, having backed up my wallet.dat file ... but Windows Defender is blocking install due to detection of "Win32/Tiggre!rfn" trojan virus. Now I get that Windows Defender does throw up false positives sometimes, but I have neither the time nor the patience, nor the technical background to sort the issue out.
So I went to look for the online wallet at Coinwallet.co ... but that website is no longer active. Uggh.
I'm just going to salt away my wallet.dat file and come look at it in a year or so. Hopefully things are better developed.