Hi Martin,
Thanks for your kind words.
It isn't a license issue, we need to convince them to support keyboard presses or Android or iOS will need a way to do it system-wide. With every new Android/iOS release we review if there are any new features we can exploit or are useful to the WunderLINQ.
One thing you can try is to create a custom keyboard shortcut for the Escape key to launch the WunderLINQ app. This will allow you to go back once in Waze. We'll work on adding this to our documentation.
Thanks,
Keith