I am sure that I am not alone in saying that JoomShopping is a really great product. It is made even better by the fact that it is free.
Yes, if you do not want to have the copyright it costs you €199. I know people complain but when you consider that Hikashop charge €119 a year for their business package, I think it is worth the money. I've paid as I like the product and want to support you in developing further.
I really wish though that you would supply more information to your users. A change log would be great - post it in German! There are enough loyal users here who would gladly translate it to other languages for you. For free.
I'm sorry but saying "many changes" to a question about the latest template in 3.4 is not going to help you grow the user base.
We want you to be successful - we want you to keep developing the product - we want it to be the best. But please, involve your users more and inform them of what you are doing, what is coming and what has changed in the latest release.