Well presumably you have a legit copy of Flymap, and you're not actually asking for people who paid for their copy to give it to you free.
On the assumption that you paid for your copy of FlyMap, and that you paid for your RoadAngel, I don't see why FlyMap would not be willing to help you. They know how to make it work, since they already sell a RoadAngel. You've gone the expensive way of buying both pieces of equipment seperately.
Why wouldn't they want to help?
Those of us at PocketFMS are constantly helping people to get PFMS to work on other hardware.