How are you operating the trainer? It's pretty old and not the most optimized of programs so it can hang if you go about things in an odd order. I usually:
1. Open the trainer then move the window to where I want it.
2. Open the game through the launcher (I'm assuming you're using the Mini version if you got AA2PPX).
3. Open the class in-game and wait on the bedroom screen.
4. Click "Open Class" in the trainer and wait for it to load everything.
5. Once everything is loaded in the trainer, click "Next Day" or whatever in-game.
FakeEdit:
Actually, are you using the Illusion Registry Fixer program or RegEdit? If the program, that's probably your issue and you should instead use a RegEdit file with the following:
Code:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\illusion\AA2Play]
"INSTALLDIR"="C:\\AA2Mini"
"PRODUCTNAME"="ジンコウガクエン2"
"VERSION"=dword:00000064
[HKEY_CURRENT_USER\Software\illusion\AA2Edit]
"INSTALLDIR"="C:\\AA2Mini"
"PRODUCTNAME"="ジンコウガクエン2 きゃらめいく"
"VERSION"=dword:00000064
Just replace "C:\\AA2Mini" with wherever you've installed the game (the folder with AA2Play.exe)