I haven't used no$ in a long long while.
Try this file: NO$GBA.INI
1. Save state in emulator
2. Then swap the .ini
3. Load up the emulator, it'll probably tell you to start a new game
4. Instead, load the previous save state
5. save in-game twice
6. Soft reset, ensure the game is able to continue (don't close the game or emulator yet, don't activate or store any more save states)
7. When you confirm it can continue, close the emulator
8. Now go to the folder and get the sav.