Thank you Bricoman.
I'll give my experience in case it may help some of you:
I've seen that some of you have problems with corrupted files; i had the same problem (download all files 3 times); i tried once again without my antivirus and it worked without no problem. I hope it can help you.
For the license the 1st choice didn't work; if you have the same problem just use the java generator and write the key in the "licence" file (just clic right and open it with "Notepad")
Thanks again !