You can set the password empty. As a result, PhpStorm won't ask you for the password when accessing the password database. However, the security of your passwords in that case will be lower.
For Windows only: if you select this check box, the master password itself will be stored encrypted in the password database. (Your Windows logon credentials will be used for encryption.)
As a result, PhpStorm won't ask you for the master password when accessing the password database.
Enter or Change
If you decided not to reset the password (e.g. you remembered it), click this button to come back to the previous dialog.