My wallet was synchronising the blockchain and now it has stopped at 567331 blocks remaining. It's telling me "Out of sync with the 1337 network", i don't know how to solve this. Btw i'm on ubuntu i don't know if it's because of this.
I have also tried to download the blockchain.zip but i don't know where to put it on my folder.

I'm letting 800k 1337 on novaexhange wallet, is it safe until i solve this problem?

Thanks for your help