Quake Injector RIP
Quaddicted updated their database and unfortunately the Quake Injector is incompatible.
It's dead until someone re-writes it. I'd suggest posting at the Quaddicted forums and see this post for more details.
https://discuss.quaddicted.com/t/whats-new-at-quaddicted/7742/11?u=dumptruck_ds
Oops
it's dead for newer releases that is - the old database does work