This just plain doesn't work on windows 10 64 bit.
I downloaded the 64-bit version from the website, tried to run it, and could never get past the title screen. The log file was no help.
I then tried the 32-bit version, but I kept getting a java.lang.UnsatisfiedLinkError: no jinput-dx8_64 in java.library.path.
If it helps, I was using jre1.8.0_45, Intel HD graphics card, and the log file thought I was using windows 8.1.
The launcher comes with its own JRE so it isn't using your local JRE.
For the 64-bit version, I assume the game froze during game loading? It seems like some Intel GPUs have a tendency to lock up on random OGL functions (glBindBuffer(), glVertexAttribPointer(), glDrawBlahBlah(), etc) indefinitely in some kind of internal driver deadlock after drawing one or two frames. I have no frigging idea what they've done to mess up that hard, and it's really hard for me to debug.
The Win32 crash is weird, we'll investigate.