When you purchase a premium subscription, it could take up to 5 minutes for your flipbooks to be stripped of their free user limitations. It also depends on the number of flipbooks you have in your account.
However, if your account is still free 5 minutes after you've purchased your premium subscription, there are two things you should try which are guaranteed to fix this issue for you.
Your current session has not been updated, so a simple log out and log back in should do the trick.
If not, then the browser might be loading an old version of the flipbook which has been cached, so the solution is to clear the cache and cookies. Refresh your cache, select your browser and just follow the steps.
Hope this article was helpful and if you have any questions, please contact our support team.