I would like to inquire, if I have purchased your project, does that mean I can use this plugin in my commercial game? I apologize for not seeing the terms of use. Also, my English is not very good, so I apologize for any awkward phrasing or terms that may seem impolite.
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If you paid for it you can, apparently: https://github.com/Electravirus/MV3D/blob/master/LICENSE.md