First, thank you so much for using Ninja Forms. It's an honor to have a part in a plugin that so many people love and rely on for their WordPress sites.
We are not active active on this forum so all support requests should be directed to http://ninjaforms.com/support/.
We actively follow up on all tickets submitted at the site above, whether you signup for a Basic (FREE) or Priority (PAID) account.
That being said, you can certainly post a question here on the forum but we cannot guarantee that we will see it.
Thanks again for using Ninja Forms and feel free to contact us at the link above for any assistance you may need.