Using the application without Java installed

[nordlicht]

Is there anything that needs to be done for this approach?

Yes:

- Install jPortable or OpenJDK JRE Portable.
- Install jPortable Launcher.
- Create a subdirectory for RouteConverter and put i.e. RouteConverterWindowsOpenSource.jar in it.
- Navigate to the jPortable Launcher directory and run jPortable Launcher (JPL).
- In JPL, navigate to RouteConverterWindowsOpenSource.jar and select it.

I have to correct myself, RC still writes to the registry when started this way.
For more information please see https://portableapps.com/ .