Ok well 1st Gameshark Codes are for the U (NTSC) Versions USA
& Action Replay are for the E European (PAL) Versions.
So im not suprised they are crashing all over the place.
As for the version you are using dont suprise me one bit.
This has all been fixed & will be avalible in the next release.
It will have U,E,A,F,G,&J Support With a Web Site URL to 1964 Cheats in the Docs/Cheat Code Folder to help you with all you have to know about using & adding cheats to 1964 (Plus a Cheats FAQ), So hang on in there for the next version