The GB and GBC emulator have been changed to Sameboy. It's very accurate. Save states are not compatible. Your SRAMs are. Please do an in game save if you haven't been already before updating

To migrate load your game as usual, you will see "Touch to start". Do not press this yet.

Go to the Game menu and turn off Autoload state

Then start your game. Your save file will be loaded as it would be on a real console and you should see the games continue screen

Once you get this far you can enable autoload state again