Thank you. I see now what I need to do now is specifically add an Audio Track while on the left side of my project window. Not sure what this specific section is called, but I need to right click where my existing tracks are and add a new audio track, and when I do that I can select all the audio inputs of my UR44.
What I had been doing was going to an existing track that was already in my project, and from the Channel Settings menu, I was trying to change the input, and when I did that, all I saw were inputs 1-4 of the UR44. While this seems counterintuitive to me that I see only 4 of 6 inputs when I try to do it that way, I guess now I know what I need to do to access 5-6.
Thanks for your help.