I'm running the patched version on 5.5.1 and the offset of +0x2840000 works great with Yen, EXP, etc. However, I'm having trouble with Treasure Keys. I've tried the following addresses:
4C330670 - crashes game
49AF0670 - no effect
49AEF530 - no effect
49AF4A86 - no effect
49AEC25A - no effect...