We installed Logos on my new MacBook Pro the other day. We tried opening it and it would say "Signing In" with the mac logo spinning, and then just shuts right down. It will never let us actually open up the Application. We tried uninstalling it and re-installing it, which didn't work either. We thought maybe we didn't uninstall the entire package, so we downloaded AppZapper and uninstalled again to make sure it was completely gone. After reinstalling again, the same thing keeps happening. Always says "Signing In" and always immediately closes. Please help. Thanks a lot!