@piersyf : As you say, I am caught between distribute the program and improve documentation.
Anyway, I have now no way to sell it. I expect to have information from vendors@Renderosity.com to start selling it.
I'm doing some additions and some changes to the program following comments from some users.
I think still working on new changes during all next week.
Thereafter, I will start to make video demos and I will take the time to make subtitles.
Tomorrow I will put a new demo version on the website of Renderosity.
This version does not match the final demo version. Next week, I will send a new demo version that will bring more substantial improvements.

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Watch demo videos on Youtube