Problems logging in to update sites

If you get the following error while trying to use an update site:

It means that you have wrong login credentionals registered and you need to reset these. Follow the following steps:

1. Select "Window -> Preferences".
2. Select "General -> Security -> Secure Storage".
3. Select the "Content" panel.
4. Click [Default Secure Storage].
5. Click "Delete".
6. Restart Studio.

This will reset all your passwords and the next time you try to contact the site you will be asked for new username and password.