My computer is registering the inputs on my controller, but Twix isn't detecting any of those inputs. I know this because I went to the Gamepad Tester site and everything was working perfectly fine, but when I try setting the input for Twix it doesn't even seem to care, I can only apply a key to use as a button for some reason. Could it be because my controller is a model without Bluetooth support and my requirement of using a USB cable to use it that causes an issue, or is there something in the settings that I'm missing?
Edit: Turns out the triggers don't count as "buttons" which is a problem as the triggers are how I use L and R in the standard input redirection client. Without them I'm forced to use either L and R or ZL and ZR by clicking the thumbsticks, and that would be really awkward to do, especially with my muscle memory of using the triggers for many other systems (including 3DS).
Edit 2: And another issue, one that seems to be pretty common; you mentioned a location to input the system IP, but there doesn't appear to be one anywhere most of us can see. Could you please specify where this "Try IP" button could possibly be?