I couldn't get character switching to work, I think it has something to do with the translation overlay.
For the 'redo the shortcut' I meant the one that says (Patch and Run)
Basically right click the shortcut > Properties and replace the file destinations with the location of the files on your comp.
Target folder should be [ (Path to folder)\CAMPUS_MT\ReiPatcher\ReiPatcher.exe -c "ShikkinCAMPUS.ini" ]
Start in should be [ (Path to folder)\CAMPUS_MT\ReiPatcher\ ]
Run the shortcut and it should work and open the game then.