I constantly have issues with App Launcher freezing on me. So i decided to bypass it by launching the game straight from .exe, it works except realm list is always Taiwan and i cannot seem to find anywhere to change it.
I was having a version of this issue in the launcher too. It often would launch Taiwan realm list even when the drop-down is set to US. I would have to unselect and select back to US and then it would launch the right realm list.