I never got as far as testing BlindWrite 4.5. I gave up after version 4.3, as I had tested every release between 4.2.5 and 4.3 each giving me different results from the first and often each other!
Now I simply either download, or make my own BWA files and use TwinPeaks and CloneCD. I don't recall a single failure using this method, and the authentication times are better too.
My test was to make a copy of Hitman2 and test it to see if it worked and then compare it's authentication time and success rate against the one I burned with CloneCD.
Don't ask me for the better versions, as I don't remember them, but I think that 4.2.5 came out best with something like a 50-60% pass for 1st time authentication.
Sorry Lapinou but until people here convince me that BlindWrite is the greatest again, I'm going to stick with what works for me.