Okay, apologies for the trouble @im_etten. I've reverted the official release for now back to 11.2, because four people have run into this and reported it. At this point I have no idea why it's happening only on certain systems, and I haven't been able to replicate it.
For now, you should be able to downgrade back to 11.2 by just installing it over the top (just make sure you install it to the correct folder, and not a folder inside of your LaunchBox folder). If you need a copy of 11.2, you can download it here:
https://www.dropbox.com/s/cg7fteljnwf0s9r/LaunchBox-11.2-Setup.exe?dl=0