Github Has been Updated, New wallet is loaded and ready for download
Windows Wallet is currently updated
WALLET UPDATED TO VERSION 0.6.4.1
Released: 2015/Nov/10
NON-MANDATORY
RECCOMENDED
(Mac and Linux to follow suit in the next few days[/s])
This wallet still does not allow to send any amount larger than ~17500 BIC. As with the older versions, it gives the "transaction creation failed" error.
You tried checking the source to see if is some kind of software lock? because if it trigger that error means that something in the code doesn't elaborate the beginning of the transaction...