With the following code you are able to start the navigator TwoNav.
Dim Intent1 As Intent
Dim pm As PackageManager
Intent1 = pm.GetApplicationIntent ("com.compegps.twonavfull")
StartActivity (Intent1)
I would do the exact same thing with OruxMaps but do not know the package name (for TwoNav is "com.compegps.twonavfull").
Someone is able to communicate it?
Thanks for the attention