The license of the plugin
What's the license of the plugin of Max? Is the plugin licensed as Apache License v2 as well as Cycles?
Right now this is a proprietary plugin and I have not published the source code under any license. You are free to install and use the plugin for any work at all, commercial or otherwise. Only I have the right to modify and redistribute this plugin.
I may eventually release the source code under an open license, but I don't have any immediate plans to do so.
One portion of the plugin, the interactive shader graph editor, is available on my github under the MIT license.