Replying to Final Cut Question, Mad karma for Answer

I have Final Cut Pro, it's installed with serial and everything

It used to work great

I downloaded Anteres Auto-Tune's Demo to try to sound like T-Pain

The demo expired, I deleted everything related to the demo

Now when I open Final Cut, it loads until it runs into the Audio Filter called "anteres auto-tune", I then get a pop up that says "your demo has expired, please purchase" and I have to click quit, and thats it

What do I do?

(I've already reinstalled Final Cut and deleted all the stuff related to Anteres that I can find)