1. If you haven’t done so, please download the latest version from here: http://downloads.wordpress.org/plugin/smart-forms.zip
2. Do something that require a license, something like:
   • Create a form with more than 8 fields
   • Create more than 3 forms
   • Export the form data into csv
   • Create a formula that uses more than 3 fieldsYou will see a pop up like this:

   

3. Click in “I already have a license” and submit your license information there.

Did this help?

I hope this helps, …but:

• If this didn’t help please create a support thicket here:https://smartforms.uservoice.com/
• If i missed to include something that would have helped you please let me know!: https://twitter.com/ed_roj