After installing the Plugin you will see a opt in system. You must allow the opt-in to enable 14 days Free Trial. Just allow and continue the opt in. If you haven’t enabled opt-in yet then navigate to plugins> Master Addons. You will see opt-in option there. Click on it and you will see something like the following screenshot. Just allow and Continue now.
If you have enabled opt in properly. It will redirect you to the element management window. If you closely take a look at the “Master Addons” option you will see “Account” option there. Clik on the Account tab and you are on next step.
If you are in the Account tab, you will see “Free Trial” option. Just click on the option to activate your free 14 days trial.
Within the personal pricing table, you will see “START MY FREE 14 DAYS“. Just click on the button and wait a few second.
After activating the Free Trial. Ift will redirect you to a new section. You will see the download links for the premium version there. Just download the pro version. Deactivate the free one and Install the pro one in your website. Check how to install a Plugin as reference.