It used to work well, now it closes inmediately.
Running in console gives me this error:
C:\Users\Tomb\Dropbox\Repositorio Alia\Retratos\Spine>java -jar skeletonviewer.jar
Exception in thread "LWJGL Application" java.lang.IllegalArgumentException: skin Name cannot be null.
at com.esotericsoftware.spine.SkeletonData.findSkin(SkeletonData.java:113)
at com.esotericsoftware.spine.Skeleton.setSkin(Skeleton.java:280)
at com.esotericsoftware.spine.SkeletonViewer.loadSkeleton(SkeletonViewer.java:176)
at com.esotericsoftware.spine.SkeletonViewer.create(SkeletonViewer.java:100)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:136)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:114)
C:\Users\Tomb\Dropbox\Repositorio Alia\Retratos\Spine>
I don't know what may have broken it, running on Win 8.1.