Hello, I'm new to this site and I'm also trying to get my EcoRoute to work without having to purchase the Ecoroute HD Accessory unit like Cat2115. But I'm totally lost and confused on what to follow on the "Transform a 37xxx to 34xx" link as I already have a 3490LMT US version. Can someone help me on how to unlock/use my EcoRoute app without having to buy the EcoRoute HD unit? This really sucks that Garmin tries to make you buy the HD Accessory in order to use it, plain dumb! ;) Thanks for any help that I can get.