If I'm not mistaken there was a pull request for the 0.4.5 wallet client on GitHub not too long ago.
https://github.com/yacoin/yacoin/pull/67
https://github.com/yacoin/yacoin/pull/67
This is for testing. We are hoping to release 0.4.5 "soon" as in, when we're done testing
In the meantime, everyone should be using 0.4.4