Won't Install Clean Journal Pro

I have paid for and downloaded Clean Journal Pro and the download shows up as "Clean Journal Pro", not as a zip file. Then I dragged it into "Upload Theme" on Wordpress. At first when I dragged the file to upload, the safari page came up with an error message, "Safari can't open page". Then I reloaded the page and it is just a blank screen with the question, "are you sure you want to do this?" but no button to click or anything. Also, the tab at the top says, "Wordpress failure notice". I tried to add the ".zip" ending to the name but the same things happened. My website says I'm running the Pro theme but I'm definitely not because I haven't added it and I can't do certain things like change the slider picture which I should be able to do with Pro. Thanks for the help.