If you purchased MAVIS before our In-App Purchase (IAP) release then you won't see any changes to the features you have access to. All the features you could access before the IAP release you can still access today.
If you are having trouble accessing features then just go to the MAVIS Store and tap Restore Purchases. You may be asked to sign into iTunes Connect.
Please contact firstname.lastname@example.org if you are having any problems.