Everything that belongs to you as a user of your survey site sits behind your name at the top right of the top bar: your profile, your password, your personal settings and the editor you work with. These settings change LimeSurvey for you only. Other administrators and your participants don't see them.
Your plan, your invoices and the survey site itself are not here. They live in your LimeSurvey account at account.limesurvey.org. See Overview: Your LimeSurvey account.
Click your name at the top right (1).
In the picture: 1 your name, 2 Account, 3 Editor version, 4 Membership & billing.
The bell next to your name holds your notifications. See Notifications.
Note: The Account page also has the tabs Personalized menus and Personalized menu entries. They change the menus of the classic survey view, and the editor of LimeSurvey 7 doesn't use them.
In your LimeSurvey account: click your name and then Membership & billing. See Overview: Your LimeSurvey account.
No. This menu is about you. Administrators with the Users permission manage the accounts of others. See Manage administrators.