So, you’re saying that you fixed the path and now it’s able to load the configuration without problems?
Then it is a matter of diving into the XML first - I just did a basic example with four buttons, not a complete representation of the A+H hardware.
Think of it as a starting point 
Satobox did a nice write up on how to edit the configuration and control-maps:
https://forum.renoise.com/t/how-to-start-editing-duplex-files/30979
Once you have a better representation of the hardware, check out the docs for details on how the configuration file is laid out
https://github.com/renoise/xrnx/blob/master/Tools/com.renoise.Duplex.xrnx/Docs/Configurations.md