Send hexx to exchange,transaction is not confirmed(seem rejected). Wallet fully sync. And now zero wallet and exchange balance. Why can it be?
Look for your tx hash here:
https://chainz.cryptoid.info/hxx/#!networkIf you can see it with block explorer, your transaction on blockchain, and in this case you need to contact exchange support.
No transaction in explorer,coin just were rejected.I used your last version wallet,fully sync.