Be sure you're signed in, then click the down arrow by your username at the top left of the page (in the black bar). Choose "EDIT MY ACCOUNT". Once there, you can swtich email address, curl type, password, upload a profile pic, and more.
Originally Posted by Geek_Chic
No you can't. Clicking on "Edit My Account" from the top of the page takes you to the main page of Clicking on "Edit Your Details" from the user control panel takes you to a page with a button that says "Edit E-mail & Password", but when you click on that it again takes you to the main page. It's been like that (that I know of) for the past two months.