In some cases, upon purchasing a premium subscription, it could take up to 5 minutes for your flipbooks to be stripped of their free user limitations, depending on the number of flipbooks within your account.
If your account is still free 5 minutes after you've purchased your premium subscription, there's 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. Here is a tutorial on how to do that. Just select your browser and follow the steps.