I found the issue by myself - the solution is to save a file to "document" folder in windows. I never ever use this folder, butt this works. Weatherlink doesn´t allow me to save the exported file directly to my dedicated directory. Besides, is there any more slick way how to export nice graphs? I managed to export just black and white, not very appealing charts. Just wondering, because I would rather something quick and nice from weatherlink than creating anything in a spreadsheet... Thanks