So I downloaded and installed your full client, and the first time I ran it, it worked fine. Since then however, the patcher will launch, but when I click start it crashes. No error message or anything, it just closes. I have tried redownloading, reinstalling, and manual patching, and none of it has fixed the problem.
Im running a Lenovo G50 with Windows 10, in case you were wondering (I've also tried running it in Windows 8 compatability mode)