I'll write up a ticket but I'm seeing the same problem.
I've uninstalled/rebooted/installed/rebooted several times (and in different combinations - even wiping the folder) but at startup all I get is a flash of the theme selection screen and then it goes away.
Windows 7 latest SP
Nvidia GTX 960 with the latest Geforce drivers from 5/3/2017
Installed the same version fine on my laptop.