I purchased pro version for our travel website. Support team replied my question on the weekend! The plugin works great! We used to have another form plugin, it was such a mess, Caldera form and this plugin made everything easier for us than before! Also, you do not need to have Caldera Pro, you can use this plugin with Caldera form free version. I remember for using Salesforce on Caldera form you needed to have a caldera pro version, and it was so expensive that was the reason why we didn't use caldera before. Thanks again!