How 

Go to https://www.classicube.net 

click on your name when in the menu.

go to the bottom of the page where it says; Account settings (Requires Password verification)

there you should have options to change your email and your password.

Here's how to do it (or you can do it jviteo2005's way):
 

   1. Go to the account page on ClassiCube

   2. Under Account Settings: type in a new email in the New Email section.

 

   3. Enter your password in Current Password (For Verification) section and press the Save All button.

  

 

Hope this helps.

9 minutes ago, Desaxu said:

Here's how to do it (or you can do it jviteo2005's way):
 

   1. Go to the account page on ClassiCube

   2. Under Account Settings: type in a new email in the New Email section.

 

   3. Enter your password in Current Password (For Verification) section and press the Save All button.

  

 

Hope this helps.

I literally said that, you just made it dumbed down more