convert scenario

I made a module vassal and during the process I thus obtained several versions of my module myV1.mod, myV1.1.mod, etc…
With a later version of my module, I created scenarios = > how may I convert my scenarios to the last version of my module?
The problem is that all the features developed afterward is not implemented if I load a scenario with the last version of my module.
Any ideas ?
Thank you !

Model Name: DELL
Model Identifier:
Processor Name: Intel Core i5-2520M
Processor Speed: 2.50 GHz
Number of Processors: 1
Memory: 16 GB
ATI Radeon HD 5870 1024 MB
HD Intel graphics 3000

VASSAL version 3.2.15
Java Standard Edition build 1.7.0_67-b01

In the module editor, if you go to Tools there is the “Update Saved Games features”. Be sure to check the help info on it as it requires specific way of working to update the saved games

Thank you Tim !