Hi guys i am new member to the forum only had my airnav radar 1 day, i bought it on ebay from a very trusting seller with a good reputation, i am a little annoyed though as the 3d upgrade that i got with it, but when entering the upgrade code states code already been used! this should not only be pointed out by airnav themselves but other people. I think it's like for example when you buy windows XP operating disc where it may only be used 3 times. on a low income im going to have to scrape enough to re- buy this 3d software. can anybody help or answer why it seems its only to be used the once, i think its rather stupid if you ask me. And yet another money making scheme from a company that seems well off as it is when the radars cost over £350 anyhow.