Dougie, perhaps I'm just dense, but I can't seem to get the app to calculate a Finish to Start measurement. I downloaded the upgrade, but still having the same problem.
On the Course screen I input course length and push the "S" button, and the arrow points from F ("marked") to S ("calc").
When I go to Measure screen I swipe to the top of the screen to F, tap the arrow and the Marked Finish Line screen comes up, w/ map. I input the counter reading, hit Done, and when I'm returned to the Measure screen the S, 1, 2, 3 mile splits are all there - but calculated from Start forward.
What am I doing wrong? I love this app but thus far have found it unusable for F to S measurements of metric courses marked in miles.