Configuring preferences and options in Outlook.com
Hi,
I apologize for the inconvenience that this issue has caused you. You may try to switch back your account to Hotmail interface by clicking on the cog icon located at the upper right of the page and select Switch back to Hotmail. If this option is not available on your account, it is not possible to switch to the old interface.
Please be informed that all Hotmail users will be upgraded to Outlook.com and plans were shared when Outlook.com preview was launched. To ensure a smooth transition for all Hotmail customers, the upgrade will be gradual. This is the start of that upgrade process.
Thanks!