Yeah, I do. I hadn't considered there might be a conflict. I never actually unplugged the bluetooth USB adapter, but after doing so, it seems to work. Hopefully it really turns out to be that simple. Thanks!
Last night I got my Wii U Pro controller to work perfectly and was playing some games on Steam with it! (Albeit with mapped keyboard settings) But now suddenly it doesn't work. Toshiba Bluetooth Stack recognizes it, but as soon as it connects, the blue searching lights on the controller stop...