From Reddit:

Hey BitcoinZ community members,

As many of you have noticed there has been an EOF issue regarding the swing wallet for the past 3 weeks. The devs found what the cause of the problem was and it has been patched. The patched swing wallet can be found here: https://github.com/bitcoinz-wallets/bitcoinz-swing-wallet/releases/tag/1.1.5.1-patched If the EOF error is still happening, close the wallet, run the ‘resync’ tool found in the tools folder and restart the wallet.

We will have an “official” release later this week

Big shout out to Renuzit for finding the cause and fixing it!

From Github:
If you have a connection error when you start the wallet, close the wallet, delete content in your AppData/BitcoinZ folder but DON'T delete the file wallet.dat ! Then restart the wallet exe.

I have deleted every thing except wallet.dat and it worked for me, my wallet is now working and coins are coming in.

Cheers