I have a 2604 with firmware 1.0.11. I downloaded firmware 1.0.19. But it is not clear to me what I use to upload: - the zip file? - update.tar.bz2 file inside the zip? - the file inside the bz2, which is system.tar.bz2? Please advise. I tried the update.tar.bz2 and it went to 100% but it never confi...