I can't play Tokon? It won't boot?

I downloaded Tokon when it came out, and then I moved somewhere new and lost my internet. I'd been playing for a while just fine, doing the story mode and combo trials. But now recently, the game doesn't boot. There's a brief flash of the launcher window opening up and then it disappears and that's it. I've restarted my PC a few times and it hasn't been resolved.

Does anyone know what happened and how to fix this?