Are you using the offline studio, or the studio using your browser? I experienced some difficulties while using the studio in my browser with right click etc. When you use the offline version, which is downloadable via the website, it should be very easy and intuitive to use (click and delete indeed). Weather feeds can be build with the studio. It is a powerfull plugin that makes you able to build your own weather feeds, so no need for RSS. If you want to use RSS, you might want to try the custom RSS reader.