An update to WeatherCat V3.3.0 test version is now available (build 175, Feb 2024) - please see the WeatherCat Development forum for more details. (Note: Forum registration is required to be able to see/access the WeatherCat Development forum).
WimI don't know for sure, but I believe CGI uploading has not changed from the manual. I don't use it but Stu did a pretty thorough edit of the manual for WC 3.0 and he didn't change the CGI section.