Don't worry - we're going to get on this. We're not trying to stop people from making mods, themes, and such.... but this is beta software, and we're trying to protect SMF from things that happened to YaBB SE in the past that drained development time and generally made for a worse product.
Please, for now, just stop distributing it - soon we will have a new license you can agree to, which will hopefully fix things. (well, something will fix it; that's still being decided.)
But hey, that's beta software for you, huh?