Hi to all,
I have the same problem on Windows 7 64 bit, E13 work weel, but when I download E14, and E15 when I started it only de error message apear (Launch4j An error occurred while starting the application).
I try to delete libraries from "My Documents/Energia/libraries" and the aplication started, I tried to copy the lbraries one by one and I found when in library folder exist exaple file ( *.ino) the aplications does not start.
In consecquence the solution is to delete/move all *.ino file from "My Documents/Energia/libraries" subdirectories. So worked for me.