Thanks. If it's not used anymore, then I won't worry about it.

Not sure how I get it to show up, other than playing around with adding/deleting/editing vehicles. It might be a coincidence, but the settings show up more often while the iPhone is plugged in and charging.

I sometimes cannot view or edit the values for the coefficient of drag (listed as "cW" in the program), frontal area, weight, etc. Here's what I tried to resolve it:
(1) Closed and reopened the program.
(2) Shut down and restarted the iPhone 5.
(3) Reset the iPhone 5 (held down both buttons).
(4 ...