After I exceeded the storage limits of my MediBang Premium subscription, when I opened my cloud data the layers were forcibly merged. How do I fix this?

When you exceed the storage limit of your MediBang Premium subscription, the data opened within the MediBang Paint application will be in PNG format.

The layers of the original file data have not been permanently merged and will be converted back to the original MDP format after you increase your cloud storage within MediBang Premium.