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app5!
First solution I used was to modify some jumps. Probably the easiest way.
But it's also possible to modify some bytes (I did it with a dozen) to enable the input box and the Enter button. Then, you can input the right code (if you found it) and click Enter.
It's not really necessary to do that, but it is the way I have prefered because you learn more by studying the code and try to understand what it really does than by just modifying some jumps.