Wallet keeps synchronising, I've tried to restart, change server and reinstall - nothing helps. It worked correctly in the morning. I'm in hurry to participate in SONM ICO this evening. I assume I can just export private keys and restore wallet in some other client?
Yeah, you can always export your private keys and restore in another wallet or a portable version of Electrum.
If you are using an HD wallet, all you need is your seed as well and you should be able to recreate your wallet in Electrum which may resolve the issue.