Ha, good question. I bought it a few years ago for about $10-$15. before they started the subs. The icon i use is called USA. I also have the Caribbean version which was nice for a BVI charter.
I tried to talk to them last summer about the different versions and devices, iphone, ipad, etc. But found that confusing. The USA one continues to work for me so its all good for now. Its nice also to have routes and tracks sync between devices.
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