used my new polar ft4 today and have some questions

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I used my new polar ft4 today for my swim. very cool gadget. Normally when I swim my beginner triathlon swim the MFP says I burn like 700 calories. this was always impossible to eat my calories burned. The new gadget / polar ft4 said I burned 407 calories. much more manageable. I registered the device on the website. but I can't figure out how to download the information from the gadget to MFP or the website www.polarpersonaltrainer.com. has anyone else done this and can give me some tips, please and thank you.