> Also you will get bitten very aggressively if you built your project in the first phase in a non-commercial version and some time later manage to get funding

> Also you will get bitten very aggressively if you built your project in the first phase in a non-commercial version and some time later manage to get funding and want to import your work into a commercially licensed version - import will not work. Qt has a somewhat similar provision in their licenses [1]. Personally I think it's acceptable, but walking a fine line. It's an attempt to make sure users can't skirt paying for a commercial license if they are, indeed, commercial. I would hope that if you contacted their customer support and politely explain how your project was using the free license in the spirit it was intended to be used, they would allow imports from the free version, say as a once-off when you purchase the licenses. [1] http://www.qt.io/faq/#_Toc453700698 http://www.qt.io/faq/#_Toc453700698