Why have you close the source ?
Your project was hosted on google.code, but you said you closed the source, but the pplication is still free. Can we know why ?
Once I've read few articles, about investigation on how Open Source programs are being selled by some users. Then I calculated how many time I spent on this project. Next day I woke up in greedy mood and decided to close the source.
I don't have time to make it commercial, I don't have time spent on marketing of this project. But I don't want anyone started to make money using my code.