This fixes GBA VC banners created with New Super Ultimate Injector v28 not showing the VC text box for non-US consoles.
Command line:
For a single .cia file: nsui_banner_fixer.exe example.cia
For all .cia files in the same directory as the .exe: nsui_banner_fixer.exe
Double clicking the executable also fixes all .cia files in the directory.
By default your fixed .cia files will be created in the out directory.
Use the -r argument to instead edit the .cia files directly without making a copy.
Use the -v argument to see more info during the process.
WARNING: Overwriting an injected GBA game will overwrite its save file.
Consider backing up your saves before, e.g. with GBAVCSM.