Dev here.
Hi,

Sorry for the delay, checked something on testcoin.

C-CEX, suprnova and UWallet(wallet.ucoin.name) on correct fork.
Current block number can get here.

If you wallet current block number don’t match with this, you must resync blockchain:
1) Go to:
On windows: C:\Users\username\AppData\Roaming\UCoin
On Linux: ~/.ucoin/ On Mac:
~/Library/Application Support/UCoin

2) Backup wallet.dat file
3) Delete all files.
4) Put wallet.dat
5) Start UCoin-Qt and blockchain will be downloaded from correct fork.

Good luck.