Download that file and paste UnityPlayer.dll into the install folder.You can download that here: DOWNLOAD [Credit to Enfyve for their work, and you can support them here: Every single mod with the exception of font mods requires that you replace this with a custom version. Inside the install folder, there is a file called 'UnityPlayer.dll'.This is where you'll find the exe file, called 'FINAL FANTASY.exe'.
From now on, I'll refer to this as the 'install folder'. If they're somewhere else, you'll find a folder there called.