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Normal
I believe this is a stock warning. I installed a different TuneEcu map on my bike late last week and received the same pop-up warning right after I clicked on "download". Made a slight change to the map I installed and downloaded it again yesterday...got the same prompt at the same time (just after choosing DOWNLOAD). I then clicked "OK" and downloaded the map just fine and bike runs great. Appears to just be an "..are you sure?" warning prior to changing ECU mapping.