Hi there!
Thanks for contacting us.
Are you talking about the SP Page Builder Pro?
I guess you are using the quickstart pack of the Helix Ultimate template? Have you downloaded the Pro version of the SP Page Builder already? If yes, then please input your email and license key to SP Page Builder -> Pages -> Option (on the right) -> License & Update (input your email and license key) -> Save and Close.
Clearing your Joomla and browser cache is always important.
If you have not installed the pro version yet, then you can download the pro of SPPB from the below link:
https://www.joomshaper.com/downloads/extension/sp-page-builder-pro
And then install it over the lite one.
Hope this helps anyway.
Best Regards