It’s currently not possible to connect your account to an email address that you used previously in connection with Facebook.
We constantly work hard on improving the app, including account management refinements, so please stay tuned!
As an alternative solution, you can try to create a new Drops account with a different email (not the one connected to your Facebook) on the very same device you used Drops on, so your progress and subscription can be automatically synced.
If you want to use the same email address that was connected to your Facebook, your account should be deleted first. Deleting an account is currently a manual process or our end, and it also means, your settings and progress would be erased too. After deleting your account, you can use the same email address for registering a new account.
If you have questions or need further help, please email us to firstname.lastname@example.org and let us know the email address that was associated with your Drops account!