FTP looks like it might be working. I'll try it out myself for awhile to see if I can work through it. If I don't post for several days it's because my brain has exploded.
All you need to do is on the left hand side of Free FTP, find that calendar folder. DO NOT GO INSIDE OF IT. Just select it on the left and then on the right, go into the folder where you wan to upload it and click UPLOAD. When you do that, you will be done.