You get the following screen.
If the user is an BASIC user ,user will be displayed with Upgrade button and if the user is a PRO user and validation period of the user is out of date,then the user will be displayed with Renew button.
Important Note:
This screen may not appear if you have a popup blocker in your browser. Try allowing the popup in browser or try to open the add-on in Chrome's incognito window. In case of any issues, refer FAQ & Support / reach us.