I think I have the same problem... Just got a WMR200 for Christmas, downloaded the free trial of WD, and got it all to work pretty well (so far), but it does not show any reading for Average Windspeed. Gust (or Current) Speed shows up fine, but even in all records, there has never been anything but 0.0 for Average Windspeed. Now, it has been rather calm, but had 2 solid hours of light wind (1.5 mph or so), and still Average is 0.0. Even the Data Log File shows only 0.0, so not sure why all other readings are being sent but this one. BTW, it DOES show an Average on the Unit itself, just not in WD. Oddly, if I click on the 0.0 on the main screen of WD, like to change units, it does show a reading, but only for a few seconds, then back to 0.0. I would love to see the answer to this, as since this is a trial version, I don't want to buy it if there is a problem!
Thanks in advance for any help!
Forgot to add... using Version 10.37j