I bought some nyc coins and decided to download the wallet for mac, while it was syncing the wallet I thought I'd send some of my nyc coins over to the wallet but didn't realise the wallet would take so long it had been a week and hadn't synced even half so I backed the wallet.data file up and tried replacing the blkindex files but it never speeded up the sync, so eventually I got it to sync on my windows computer. However when I tried to replace the wallet.dat file on the windows computer with the one I used on the mac to send the coins to, the nyc wallet wouldn't open it kept freezing on the nyc logo. Does anyone know if this can be fixed, or have I lost all the nycs I've sent!!! 

Can anyone please help me, thanks