Can you check to make sure LanguageStringPatcher.exe exists in the same directory as SkyEditor.ROMEditor.UI.WPF.exe? If it does not exist, try redownloading Sky Editor.
I'm going to need to add some more logging, but in the mean time, can you make sure you're able to launch MessageFARCPatcher.exe, located in the same directory as SkyEditor.ROMEditor.UI.WPF.exe? If a console window doesn't open and immediately close, then that may be part of the problem.