What was the point of the author upping the source code in first place, considering that he did not want anyone to modify the code. The main reason people up source codes, is so that other people can modify it and keep making improvements to the code.
Are you sure you did not misunderstand the license? Like was it not just saying that you should not modify the code and then re release it as your own work? Any chance you could copy/paste that bit from the license?
Edit: I just saw that the license part was already posted..
I have to agree with some of the previous posters, that the author is just talking about the original archive. I dont think it was meant to stop people from releasing a modified version under a different archive name. Just make it clear in the archive name that this is not the original version and it should be fine.