iDisplay stole my Fn key, my virginity, and my Quicksilver

In short:

-I use Modifier-Only Activation (Fn key once) to launch Quicksilver
-I installed iDisplay
-My launch key stopped working
-I uninstalled iDisplay
-I tried other modifier-only activations
-It continues to not work
-I reinstalled Quicksilver
-It continues to not work

Shape Services (maker of evil incarnate aka iDisplay) has been unresponsive.

It seems the app has retained some kind of control over the modifier keys, prohibiting me from using them as a global hotkey.

Can someone PLEASE help me regain control of my F'n Fn key?

Good call, I used your method, and found some files that I didn't know were there. I promptly deleted them,

IT WORKED! Albeit intermittently, but... it's working.

How can I ever thank you enough?!