It's just two dudes working on it, what do you think they're going to do, sue you? Licensing intricacies are (rightly) not their main concern right now.
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No, you've completely missed the point... there is no such as "the wrong filename". Dragon Ruby has not made any attempts to market themselves as an "accessible" or "starter" game engine, plus it's still very early on in development so it's not fair to compare it to other game engines that have been around for years and are much more mature.
I played through a random game and it was actually pretty fun! Sort of guessing as I went but it was decently straightforward (maybe because I've heard you guys talk about it). The cave drawings fit with the primitive theme. You should put some game screenshots or concept art on the game menu!