I tried updating 1.2.1 through message center as described at
http://www.abantecart.com/ecommerce-documentation/user-manual/installation/core-upgrade#Install_manuallyI do not get a window in the message manager as shown in the above link. My window is a view only window, no link to click. So I copied and pasted the address. And get "Page Not Found!
The page you are looking for could not be found! Please contact your administrator if the problem persists." within the admin.
Attached are pics of my message manager