Pardon, but I have trouble understanding your steps - You do not have to locate specific file updates, and I do not know in which context "asking me to register again" is. Registering on the website, or do you mean login on the FAF client, or both?
For your client issue, I would suggest making a clean installation by following the tutorial from here, starting at 2.1. If that does not work, then providing screenshots of your issue(s) may help further to narrow it down: