..I purchased the premium version before, I wanted to delete the old data of the main vault, but I deleted and reinstalled the app several times, and then it became lite when I activated the account...

Hi @QDTH

Welcome to the Enpass Forums.

To access your Enpass Premium license on multiple devices, you will need to register on your app via the email address with which you bought the license. You can refer to the steps in this link on how to do so.

Otherwise, please contact us at support@enpass.io and share the email address with which you bought the license along with the purchase receipt, and we will have this further investigated for you.