The Ys I trainer works great. But for Ys II, only the infinite HP cheat seems to work. Everything else, like the EXP and gold modifiers, moving to out of bounds areas - that stuff seems to be borked. And I'm sure I'm using the trainer for 2, not 1.
Delete trainer and all files in
C:\Users\USERNAMEHERE\AppData\Local\Temp
C:\Users\USERNAMEHERE\Cheathappens\Work
C:\Users\USERNAMEHERE\AppData\Roaming\Cheat Happens\0x90
Reboot PC to clear excess memory, get a fresh copy of latest trainer, try again.