I proceeded as follows:
-chose map markers. 2 Markes were shown. Start and Destination
-click more
-plan a route
-select profile
-options (should offer the option . new file?)
-select navigation
-details
-save as new track
Most of the time I show the track on the map and ride my track.
This time I started on my new track and selected navigation.
And was astonished that Osmand started anew calculating a track.
Seeing this I recorded it.
See all this in the Zip-File.