Sydney Pro is a different theme than Sydney so you install it by uploading the theme zip to WordPress (Appearance > Themes > Add New > Upload Theme). However, all your changes and customizations will remain in place once you switch from Sydney to Sydney Pro.
Once you have purchased Sydney Pro, here are the steps to install & activate it:
- Make sure you’re logged in to your athemes.com account and click on My Account:
- Click on Downloads and then click on the Download button. You should receive a zip file. If you don’t receive a zip file when you click Download, make sure you disable the unzipping feature from your browser.
- From your admin area, go to Appearance > Themes and click on Add New
- Click on Upload Theme and select the zip package you have received in step 3.
- Install and activate Sydney Pro.