Delete Hotmail Account From MSN Explorer?

Have a long-time friend who is almost totally computer illiterate to whom I provide tech support. He uses MSN Explorer (MSNE) thru Verizon.net, which has been free up 'til now, but beginning March 1, 2012, Verizon is dropping it. I advised him to drop MSNE and switch to FREE Outlook Express (computer OS is XP) or Thunderbird. But as you might expect, he is averse to change. To keep MSNE, he had to subscribe to it and pay the $9.95 annual fee for the basic version, which he did today.However, he has apparently also had, but never used, a Hotmail address, and on the MSNE e-mail page, it shows in the left panel like a separate account. He wants to remove it from MSNE. I know nothing about MSNE; am used to Outlook Express and Thunderbird, both of which have simple access to accounts, including deleting them. I can find nothing in MSNE about deleting the Hotmail account.So how can he delete the link to his Hotmail account?