Update to 2.6.3 not working

I just purchased the newest version of Clean Magazine Pro. I am having problems with updating to the latest version. I have read the directions, but I am concerned that using the ftp will overwrite all of my files, and I will have to start all over again. When I try to upload the .zip the install fails. When I try to download Catch Updater Plugin, NOTHING happens, the green circle just keeps going around. (so far at least 5-7 minutes). The header is messed up, the video links are now on all pages. the top menu is missing. The news ticker is gone. Help? https://www.blowoutthefilm.tv/