You need to install both plugins on this page (CartFlows & CartFlows Pro). If you already installed free version of CartFlows, please replace with this one. And do not update free version from your WordPress dashboard if it’s available. Wait for update from us, then download and install it to your site.
Get license key for CartFlows HERE.
***Please read Troubleshooting & FAQ for Installation Guide, How to Update, Turning off License Activation Notices, etc.