Stop the space bar from making the screen scroll

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Hello,
I downloaded this extension for chrome recently to try and stop the space bar from making the screen scroll. So I tried and failed, but thats not the problem. The problem is that now my space bar is working all weird. Like I can type this, and I can type messages in Facebook, and I can type in the search bar, but I can't type comments? There isn't a reset changes button on the program, and I already tried removing it from chrome. Help?

The extension is https://chrome.google.com/webstore/detail/shortcut-manager/mgjjeipcdnnjhgodgjpfkffcejoljijf/reviews