A new version of the launcher is available, be sure to either run your launcher and let it update, or grab the newest version here.
The new version adds a checkbox that allows you to use World of Warcraft’s “Launcher.exe” as the launch target instead of “Wow.exe”, as well as the command line argument “-forceupdate” to force the application to update itself.
PS: This is probably going to be one of the last versions of this program. The code has become extremely unmanageable due to how sloppy my coding was when I started this, and I personally don’t play WoW anymore.