That is exactly what happened to me. I have had my station up for a week. I setup my web page with Weatherlink last night and thought ‘this is ugly’. Found WD and thought that looks nice and has more options. Went to try the trial version and I can not get it to communicate since there is no Com port. I have been everywhere (boards) trying to figure this out. I am so glad I found this post. I was starting to think I was loosing it. I am not sure how to proceed though. With the new software Davis will not be assigning a com port to the usb anymore? So will WD create a fix or is the only way to downgrade the Weatherlink software?