Need to upgrade frontpage from old customized theme to Divi theme ASAP! Installed Divi theme already. Need by Friday this week.
You cant just install Divi theme and activate it. First it will look very ugly and second you will probably see shortcodes from your old template. Can you please provide to me link from site?
My advice is to make site on test server and when you are finish just migrate on your live domain. In this case you will have always online your domain. And if you have big site it is impossible to make new site in so short deadline.