Woa! Relax!
I did not have a bad experience with "the guy" when I bought my NavAll from him. On the contrary! I have received great support from him (and the
other member over here). I am sorry you have lost money to him.
And I only suggested to ask "the guy" for the firmware of his device.
And I did that some time ago so why the "sudden" outrage?
Would not it be a good idea to start 2019 with a slightly more friendly way of communicating to fellow forum members?