@CharlesMacleod
After watching your advanced customization video here, I tried out using application settings for the first time. I was concerned by the fact that the user.config file was stored in a path the last part of which was "3.2.0.0."
I looked at "Persist Application settings across multiple Pro versions" in the pro guide here. In the second bullet point it says to "Be sure to set it's Roaming property to True also." I couldn't find where to do that and after some research am wondering if this is still necessary.