Topics show mostly crashing on Mac OSX El Capitan. Spine hasn't been updated since El Capitan's release. It's also not clear what's causing it yet.
You seem to be the first to report silent crashes in Windows 7.
So this is your first time installing and running it? Did you notice anything at all that triggers the crash?
This is really unusual behavior, especially since nothing's changed in the editor for months since it stabilized and people have been using it just fine on Windows.
No ability to save is pretty common for trial software. Why would that have anything to do with crashes?