Can't import theme

I purchased the Sydney Pro upgrade and was sent the email with a download link. I downloaded the folder and converted it to a .zip since it says on Wordpress it had to be a zip file. When I go to Themes --> Add Theme --> Upload, I get an error that my file is too large. What did I do wrong?

Hello there,

Does the package disappear in your account? Email us the username and password you used to purchase the theme privately to, so we can double-check it.