ALESTE 2 hidden options screen (how to get out)

I want to use the hidden difficulty options in ALESTE 2 since it seems the game has a bug that will make the game too hard or too easy depending on which disk you start the game with. And I want to play the game on normal.

I know I can access this menu by pressing the [Select] key while booting the game. However I don't know how to get out of this screen and if I use the software restart option (on an emulator) the changes won't take place.

So I'm wondering if anyone knows the command to use to get out of this menu.

Thanks in advance for any help.