Your profile has a new tab, Sign ins. Open it from your name in the menu. It lists every browser signed in to your account and every API key, with when each was last used and the address each browser signed in from.
A browser you don't recognise can be logged out right there, and Log out all other browsers logs out every browser but the one you are using. Your API keys keep working. Changing your password also logs out your other browsers.
A browser stays signed in until it is closed or logged out, and now also until it has gone unused for 30 days.
An API key for each program
Until now your account had one API key, shown on your profile and shared by every program you used it in. Now each program gets a key of its own. Press New API key, give it the name of the program and press OK.
The key is shown once, so copy it into the program straight away. If you lose it, make a new key and delete the old one. A key keeps working until you delete it, and only you can make one for your account.
When a key is made we send you an email saying which browser and address it was made from. If it wasn't you, delete the key under Sign ins and change your password.
Your old key keeps working as before. It is listed as API key from the profile, and once each program has a key of its own you can delete it.
Deleting a key or logging out a browser asks first, and tells you what stops working.
