Wow guys, we get help very fast here! I am sorry for replying so lately. The main reason why I posted this topic is that we have very slow and limited connection in my region, so if we download about 600 Mb file in each release, whether the release has very big, important and many changes or small updates included, we may not even get the full file before connection is stopped. I don't mind doing things myself — apart from touching source codes, I am not a programmer — as long as it does not cost me a lot of data. So I am always happy to do whatever you suggest me.