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MapC is a tool for making new pieces for the game such as alternate balls or bonus levels, but it doesn't open right. It has a pop up that closes a split second later and nothing else happens. What is this about?
MapC is located in neverballportable/app/neverball/mapc.exe
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that part of the game hasn't been portablized and won't work. it would need a separate portable launcher.
Sometimes, the impossible can become possible, if you're awesome!
This wasn't a problem, it's a weird script you run with Command prompt in a complicated way, and it works fine. And is portable. So if any admin want to delete this go right on ahead.