Here is a little tool for editing a trip odometer file. This program lets you adjust the starting point for your current trip - even allowing you to create a "trip" that is the entire coach history.
To use it, you first must figure out the name of the trip odometer file. Right-click on the odometer, then click "View History". At the top of the history file window will be the name of the history file, something like "Odo31415926.odo.txt". Remember that name.
Next, start OdometerEditor.exe, and open the file with the same name you just remembered, but without the ".txt" extension. The program will then show you the starting point for the current trip leg on that odometer. You can adjust those values however you like.
For example, to create an odometer that shows your totals and averages since the coach was born, simply set all the start values (fuel, time, and miles) to zero. That's all you have to do.
To install the program, just download it into your VMSpc directory. That's all. To run the program, click on the Start menu, select "Run ..." or "Run Program", click Browse, and browse to the VMSpc directory and click on the program icon/name.